You must play through the of The College of Winterhold quest line. It can be found on Morokie in the Labyrinthian dungeon after you kill him as part of the quest.
No.
At Shearpoint located to the northeast of Whiterun. There is also a dragon there to so tread lightly.
It is at Labyrinthian, east of the entrance there is a dome-shaped structure, inside is a ruined stone shrine and a skeleton, the wooden mask is on the floor.
he is wearing the arch mages robes, with a dragon mask on. The dragon mask can sometimes glitch, making the head invisible.
Ragnvald is located north of Markarth City.
Solstheim is an island North-East of Skyrim, and was given to the province of Morrowind to allow the Dunmer to settle there.
It depends on which one you are looking foor. Each hold in skyrim has its own hall of the dead.
The Khajiit are not native to Skyrim, and therefore do not have a formal settlement. They can be found in cities as traders or other NPC's but there is no settlement for them.
they are scatterd all over skyrim but you could buy them from Phines Gestor he is in the collage of witerhold located north of winterhold
Lake Arrius Caverns is located in the game Elder Scrolls V: Skyrim. It is situated near Lake Arrius in the province of Skyrim.
Skyrim is just one of I think 5 or 6 territories in TAMRIEL. Others are Cyrodil.. ah i don't know. Anyways, the answer is Tamriel.
Nothing. They are not essential. You just won't get the ninth priest mask, without the other eight.