First Car...2001 Audi A4 Quattro 1.8 Turbo?

I'm 17 years old and have finally saved enough to buy my first car. I honestly do not know much about cars, but have been looking at the 2000-2001 audi a4 1.8. I've found a couple with ~75-80k miles. How much maintenance should i expect with a car like this, and is it worth it?

Well they are very respectable cars but if something should go wrong they are EXPENSIVE to fix.