to start off, you can only use cloth armor (but I don't think that was your question). Find armor with Stamina and Intellect to begin with. Eventually, you'll want to start getting gear with spell damage but that won't be for a while.
As for talents, I think your first 5 points should go into improved corruption as it makes it an instant cast spell (in other words you can cast it while running).
First and foremost, take a look at the top of this forum and read the stickies. A lot of questions are answered there.