Thank for playing, I don't remember much myself about this game but I will try answer
1.You have to kill a lot with Valka I believed
2.You just interact with the prince body
3.yes
4.it is, but so very little, it kinda like unexplored concept
5.yes
6.It a Ring, called Ring of motis, inside a Buried chest in Isolated cave
7.Scroll is Remembrance of Logan
8.yes, it is him
9.Un use
10.most of them are cut content