you use them
you level up and then upgrade your magic skills
you can't level up with minor skills. only your major skills level you up. you can still level up minor skills even after you reach your max.
You don't need to be in a city to level up skills.
No, you can only level up with your major skills, minor skills will only give you extra points in your attributes when you level up.
Yes, you can level any skills, regardless of level, up to level 100. Although if you are using the PC version, you can open up the game console (there are many online guides on how to enable this) and use console commands to improve all skills to 255. The reason for this is the use of a binary value for skill levels.
level up and enimies will have them eventualy
yes but its only caused by having not enuf skills to level up I'm lveve 48 and i have 5 level 100 states so theirs not much to level up however in theory you could go to jail loos some levels then level up agen i dont know if this decreases your level as well as skills
Its depends on your race and major skills... but i think the max level is beween 55-65 depending on the choice of race and major skills...
There are no dragons in oblivion.
Upgrade your intelligence when going up a level.
I believe its impossible because no matter what race and major skills you pick...there is no way to get to level 100...then again you can use mods...
it doesn't matter what level your player is but it does depend on what areas you go to, but in oblivion your level of difficulty depends on how strong the daedra are.this is from experience. im a level 40 sumthin nord.