How to set up an iphone? Also can they be on pay and talk? (telus)?

My brother recently gave me an iphone4.
i'm justing wondering if I need to set it up with him there, since he gave it to me.
what would be the cost?
also can you put the iphone4 on pay and talk?

You can use the phone on prepaid, no issues. If you want to use the phone outside Telus, you will need to unlock the phone.