Where would i go to buy a turbo? Will i need to replace fuel injectors...etc... and what application will fit my 93 civic DX 1.5

you can buy turbo kits online or at most performance shops. As for fuel injectors... depends on how much boost you will run. The setup will cost you over 2,000, so im sure you're looking for more than 10 or 20 hp. In that case you will need to run atleast 6-8 psi... which would require larger/extra injectors. as for applications, you can make just about any turbo fit with the right piping. Check www.turbo-kits.com to see if they have one for your car.

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-brian