Several comments and questions are included in your request:
Comment: "it is said that those of Torvaldsland believe in "Rune Priests""
In the same way the majority of Goreans believe in Initiates, then yes, those of Torvaldsland believe in Rune Priests.
Comment: "they read omen chips"
Yes, this is shown in Book 9 on page 152.
Question: "Can women be Rune Priest?"
There is no evidence that there are female Rune Priests, anymore than there are female Initiates.
Question: "Do Rune priest use omen chips or rune stones to foretell the future"
Again I reference Book 9, page 152 since this is the only place where omen chips are mentioned. It says that "these chips are thrown like dice, sometimes several times, and are then read by the priests". It does not say, specifically, that this reading is to foretell the future, but that certainly seems to make sense.
Rune stones, on the other hand, are more like markers, signs or indications of boundaries. The most familiar is the Torvaldsmark, taken by many to mark the border between Torvaldsland and the south.
Religious rune stones are mentioned on page 230.
And then there are rune stones described as important, for in these stones were the names of mighty men and songs of their deeds, see page 231.
"Five nights from this night," said Ivar Forkbeard, "on the Skerry of Einar by the rune-stone of the Torvaldsmark."
I had heard of this stone. It is taken by many to mark the border between Torvaldsland and the south. Many of those of Torvaldsland, however, take its borders to be much farther extended than the Torvaldsmark. Indeed, some of the men of Torvaldsland regard Torvaldsland to be wherever their ships beach, as they took their country, and their steel, with them.
Marauders of Gor    Book 9    Page 45
(describing Kaissa in the North)
The board has no Initiates, but there are corresponding pieces called Rune-Priests.
Marauders of Gor    Book 9    Page 57
The Spring Equinox, incidentally, is also used for the New Year by the Rune-Priests of the North, who keep the calendars of Torvaldsland. They number years from the time of Thor's gift of the stream of Torvald to Torvald, legendary hero and founder of the northern fatherlands. In the calendars of the Rune-Priests the year was 1,006.
Marauders of Gor    Book 9    Page 58
I could see, against the night sky, the darker shape, but low in the water, of the skerry. Too, against the sky, I could see the tall rune-stone, looking like a needle against the stars, which forms the Torvaldsmark.
Marauders of Gor    Book 9    Page 75
"The wergild must be high," I speculated.
The Forkbeard looked at me, and grinned. "It was set so high," said he, "out of the reach of custom and law, against the protests of the rune-priests and his own men, that none, in his belief, could pay it."
Marauders of Gor    Book 9    Pages 93 - 94
We saw thralls, too, in the crowd, and rune-priests, with long hair, in white robes, a spiral ring of gold on their left arms, about their waist a bag of omens chips, pieces of wood soaked in the blood of the sacrificial bosk, slain to open the thing; these chips are thrown like dice, sometimes several times, and are then read by the priests; the thing-temple, in which the ring of the temple is kept, is made of wood; nearby, in a grove, hung from poles, were bodies of six verr; in past days, it is my understanding, there might have been decided, however, a generation ago, by one of the rare meetings of the high council of rune-priests, attended by the high rune-priests of each district, that thralls should no longer be sacrificed; this was not defended, however, on grounds of the advance of civilization, or such, but rather on the grounds that thralls, like urts and tiny six-toed tharlarion, were not objects worthy of sacrifice; there had been a famine and many thralls had been sacrificed; in spite of this the famine had not abated for more than four growing seasons; this period, too, incidentally, was noted for the large number of raids to the south, often involving entire fleets from Torvaldsland; it had been further speculated that the gods had no need of thralls, or, if they did, they might supply this need themselves, or make this need known through suitable signs; no signs, however, luckily for thralls, were forthcoming; this was taken as a vindication of the judgment of the high council of rune-priests; after the council, the status of rune-priests had risen in Torvaldsland;
Marauders of Gor    Book 9    Page 152
This hill was set with stones, rather in the manner of terraces. On these stones, set in semicircular lines, like terraces, stood high men and minor jarls, and rune-priests, and the guard of Svein Blue Tooth.
Marauders of Gor    Book 9    Page 169
On the wooden dais, draped in purple, set on the contest fields, in heavy, carved chairs, sat Svein Blue Tooth and his woman, Bera. Both wore their finery. About them, some on the dais, and some below it, stood his high officers, and his men of law, his counselors, his captains, and the chief men from his scattered farms and holdings; too, much in evidence, were more than four hundred of his men-at-arms. In the crowd, too, in their white robes, were rune-priests.
Marauders of Gor    Book 9    Pages 181 - 182
The great ring of the temple of Thor, stained in the blood of the sacrificial ox, was brought. It was held in the hands of the high rune-priest of the thing. Svein Blue Tooth grasped it in both hands. "I swear upon you the peace of the thing," said he, "and I make this oath of peace, for the time of the thing, mine own as well."
Marauders of Gor    Book 9    Page 184
"You tricked me!" cried out the Blue Tooth.
"Yes," admitted the Forkbeard. "It is true."
Svein Blue Tooth, held in the arms of his men, struggled to unsheath his great sword of blued steel.
The high rune-priest of the thing interposed himself between the violent Blue Tooth and the Forkbeard, who was, innocently, regarding cloud formations.
The rune-priest held up the heavy, golden ring of Thor, the temple ring itself, stained in the blood of the sacrificial ox. "On this ring you have sworn!" he cried.
Marauders of Gor    Book 9    Page 188
At last the Blue Tooth turned to face the Forkbeard. Svein's face was red with rage.
The high rune-priest lifted the sacred temple ring.
"The peace of the thing," said the Blue Tooth, "and the peace of my house, for the time of the thing, is upon you. This I have sworn. This I uphold."
There was much cheering. The Forkbeard beamed. "I knew it would be so, my Jarl," he said. The high rune-priest lowered the temple ring.
Marauders of Gor    Book 9    Page 189
There was carving in the passage, rune letterings and pictographs, in linear borders.
Marauders of Gor    Book 9    Page 229
Pictographs were much more numerous now, and, instead of being linearly bordered the walls were now decorated in columns of runes and designs, and pictographs. Torches, unlit, in wall rings, were still illuminated as we passed near them. Many of the columns carved, with painted surfaces, on the walls, reminded me of rune stones. These stones, incidentally, are normally quite colorful, and can often be seen at great distances. Each year their paint is freshened, commonly on the vigil of the vernal equinox, which, in the north, as commonly in the south marks the new year. Religious rune stones are repainted by rune-priests on the vigil of the feast-season of Odin, which on Gor, takes place in the fall. If the stones were not tended either by farmers on whose lands they lie, or by villagers in whose locales they lie, or by rune-priests, in a few years, the paint would be gone, leaving only the plain stone. The most famous rune stone in the north is that on Einar's skerry, which marks the northland's southern border.
"Can you not read these runes?" I asked Ivar, again.
"I am not a rune-priest," he said.
Ivar's reply was not a little belligerent. I knew him able to read some rune markings. I gathered that these, perhaps because of antiquity or dialect, were beyond him. Ivar's attitude toward reading was not unlike that of many of the north. He had been taught some rune signs as a boy, that he could understand important stones, for in these stones were the names of mighty men and songs of their deeds, but it had not been expected of him that he would be in any sense a fluent reader.
Marauders of Gor    Book 9    Pages 230 - 231
