You want your car in auto salon? I dont think $15k will cut it, sorry to burst your bubble. Also you gotta consider insurance. Insurance for a 17yr old with a turbo import would be over $3000 a year i would guess, if you can get it at all.
Without getting you down dude, you'd be better off getting a bunky till you can learn to drive properly and your insurance premiums go down a bit. If you still want a jap turbo car, i personally reckon you'd be better off getting a 180sx or silvia first, cheaper, good performance and insurance 'should' be a bit easier to get hold of.
Just my 2c tho...