Just bought a Scion Tc and its lowered, how can i raise it?

Find out how it was lowered. If it's just springs, all you have to do is replace them with OEM springs. Check a scion enthusiast forum. You could probably pick up used or new springs from someone that lowered their car for around $40 tops. I'm pretty sure I have some springs laying around somewhere, so if you want, you can e-mail me. I'll sell them for shipping costs. It would probably cost you around $100 to get them installed.