You can get the dark wizard robes if you pass the test the Demon Door somewhere in darkwood gives you. You will have to fight serveral waves of Hobs, not really hard actually.
You can get the bright/dark wizard hat from the Book Collection quest in bowerstone south (that is if you have TLC). There is a thread about that here:
http://forums.projectego.net/book-co...se-books-3113/
Have fun, and remember- Fire magics are the best!
There is none "levels" in Fable, instead your character spends experience on different abilities to gain new skills or improve already learned ones.
But you could call that levelling, i suppose.