01-05 Celica GT-S Tunning help?

I'm going to buy a 6 speed Toyota Celica GT-S soon and i have some questions. 1)How much horsepower would getting it tuned add (approx)? 2)How do they tune an engine? 3)How would I get the engine to handle a turbo without blowing it? 4)Would it be cheaper to bore and hone the cyclinders? I know i could go... show more I'm going to buy a 6 speed Toyota Celica GT-S soon and i have some questions.
1)How much horsepower would getting it tuned add (approx)?
2)How do they tune an engine?
3)How would I get the engine to handle a turbo without blowing it?
4)Would it be cheaper to bore and hone the cyclinders?
I know i could go get an 85 Corvette or anything with a V8 and blow to doors off a little 4 banger, my family has a 2010 SS and i love muscle cars but i personally like Celicas and just wanted info so if you could help, I'd greatly appriciate it!
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