Not sure if Kinko's will print them out or not as I did my transfers on my own printer. I also used Amy's transfers for our shirts and I'll never use any other transfers in the future! They are the absolute best out there!
If you print them at home, just be sure to set your print options to the 'best' feature and you should be fine. The instructions are pretty self explanatory, but you can always ask on this board if you get stuck!
Now that I'm thinking about it, I don't *think* Kinko's will print them out because of the copywrite. You could always either call them or go in and talk to the people at the print center and see what they say.