In defence of the OP, he has been registered for a year, so if he was planning to steal an iPad 1 year ago, then ask on here about the passcode a year later, I think it's very unlikly. Things like this do happen, give the guy a break and help him.
Restore, or go in to the Apple store, I'm sure a member of staff will be happy enough to help you. Pending if you can show proof you're the legit owner of the iPad.
+1, well said