Congrats on your purchase first of all! Since you are in the exterior and appearance forum I will go and try to make an attempt to give you some suggestions to make your car look beter. You could get.... You could look into a body kit of somekind, I am personally not a fan of very many but you could look for yourself... you could get clear corners, different headlights, tint your windows, get new wheels, paint your own (do a search this is a cheap alternative for a better look in my opinion).
good sights are www.vividracing.com (although I have never purchased anything from this vendor I hear that at times they have been shady so you may want to look into the vendor forums and look and see if people are having good experiances with then again. None the less it is a large website with lots of parts etc...especially body kits)
As for power mods which I believe should be done before you start getting into body kit etc... are...
engine management, a reflash would probably be perfect for you, like Cobb, ecutek. Check out cobbs website www.cobbtuning.com. (dont get a boost controller)
gauges (boost, egt, water temp) something like that but boost and egt are probably the most important for a turbo car.
Other than that just stick around start reading post in engine performance and you will start to catch on. Other great resources are www.nasioc.com, www.wrxforum.com those are my favorites at the moment.