no
In "The Elder Scrolls IV: Oblivion," the Sideways Cave is a hidden location that players can access by finding a specific entrance. The cave is notable for its unique layout and the illusion of being "sideways," which can be disorienting. To navigate it effectively, players should pay attention to their surroundings and use the environment to their advantage. Exploring thoroughly will reward players with various loot and encounters within the cave.
Deep scorn hallow
Usually in random loot.
They can be dropped as random loot, or, you can make one using a Sigil Stone.
It is found randomly in loot or on enemies. You cannot be sure of finding it.
buy it.find it on random loot or make it with alchemy
In random loot, I believe.
To get better weapons just level up and you'll find better weapons when loot remains.
Barren cave.
that would depend which add-on but really just collecting loot from enimies and selling it
In fact there is no Exp on oblivion but the higher the difficulty the longer it takes to kill the Creature/Person which means the fight lasts long enough to increase one of your skills.