i bought my ipad from pawn shop. how do i get previous owner apple id/icloud info off? i dont know this person at all

You need to return the Device for a refund.

The Apple ID and Password that was Originally used to Activate the iDevice is required

If you do not have that information you will not be able to use the Device.

Activation Lock in iOS 7 > http://support.apple.com/kb/HT5818

If the ipad is running iOS 7 there is no way. It is called "activation lock"and cannot be overcome. Take it back and try to get a refund. Good luck!