I'm not sure about prices too much. Do you have access to a color printer? Because from there, you will just need the photo paper and color ink. When you start school, check out the art department's and photography department's photo printing centers. They should have free/affordable student printing.
Whoa! That's way too much just to print! I do know places like Staples and probably Office Depot have printing services. Just have your stuff on a flash drive. Don't know about prices, though. But they should have very high quality. I printed a few pieces for a photography class at Staples, I believe.
It depends on your printer on what ink cartridge you will need to buy, but they last a decent amount, I believe. It would also depend on exactly how bright you wanted them to come out. But color ink can be pricey.