If would depend on how much you raise your attributes each level. You can either slow-level by increasing attributes +1 point at a time (+1/+1/+1) until all your attirbutes are raised to 100 (it does not matter what race you are or what your favored attributes are, they all equal out to 300) which would lead to a maximum possible level of 100, on the other hand, if you chose +5 attributes every time you leveled (+5/+5/+5) then you would max out all your attributes at merely level 20.
Recap: Highest possible skill level: 100
Furthermore, the highest possible Character level is approx 48. This is based on 7 major skills each starting at 25 and 40 to 45 race skill bonuses (assuming they contribute to your major skills).
So the Math:
(700 max skill points - 125 points base major skills + 40\45 racial bonuses) / 10
= 48 (or 48.5)
Summary: It might actually be better long term to choose a race with skill bonuses NOT related to your overall class to give you a theoretical MAX LEVEL of 52!
EDIT: If you are talking about the highest character level that you can get it is level 255.
There are no dragons in oblivion.
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...
you use them
You need to level up to about Lv17 or so, to make the highest quality sigil stones appear within the Oblivion gates. The best give 20% chameleon, so when applied to helm, cuirass, gauntlets, boots and shield, you have 100%.
Buy or find them.
Depends on what level you have it made. As you level up, higher, more powerful armor and weapons can be made from amber and madness ore. The highest quality of amber armour is even better than glass.
level up and enimies will have them eventualy
you play the game
You'll need to be at least level 10.
Basically, Any sentient human being or dremora soul can be placed inside the gems, and will automatically equal to a Grand soul (highest level soul in the game)
The highest level is level 20.
The highest level is level 20.