Trying to get games etc. on to ipod touch but having major problems..!

When I try and sign into my Store app on my ipod touch that I can only get to by going into my settings the only thing that happens is that a pop up message shows on screen saying that I have not used my apple Id in itunes yet and to tap on reveiw or cancel . When I tap on review it does Nuthing at all. I also dont have the itunes app on my ipod touch so this is causing major problems for me as it does not seem as if i can sign into itunes on the internet or even when i try and sign in on my laptop as I have itunes downloaded there.This is more then fustrating as I cannot see the reason why everyone I know that has an ipod touch does not have this problem and im trying to solve this problem for over a year and nuthing seems to be working ...?? Any suggestions would be a major help..!