Had a couple questions if it was Retina Display or not... And I believe it is not Retina and will sell it as so. If it turns out to be Retina than a plus for the buyer.
No, it's an AT&T iPad and they have a few different no contract options you can buy to have data on it. You can also add it to some AT&T cell phone data plans.
It of course works on any wifi for free if you don't want to buy data for it right away.