Noobs... Too many of you are expecting Z car performance for a Corolla price. It's not going to happen.
From a real tuner's point of view, you can always add power. It's reasonably easy. You can't easily 'add' a good chassis, un-fuck bad suspension design (no offense AE86 guys with your solid axles...
), and cutting weight is a freakin' nightmare if you still want your car to look decent.
Start with the basics. Light, rigid chassis, good suspension geometry. Passable amount of power. If I get too bored after a while of being only averagely fast in a straight line, I don't need Toyota or Subaru to help me there.
And there are probably shops in your area that can help you too, if your ego gets too badly hurt when you're trying to race turbo Sonatas. Geez...