Purchasing iphone 5 questions

Question number one: If i go to verizon and start a new 2 year contract with them can i get the iphone 5 for $199.00 Im in the US. also do i have to have good credit to get the phone and contract in my name?

Question number two: If my step dad adds a line to his existing account with Verizon for me can i get the phone for $199.00 with a two year contract. Someone told me it would cost more than that since i'm not eligible for an upgrade...