I don't think you can - short of a Factory Reset ... but even after that, you wil be required to have you GMAIL account to activate everything. probably a security thing. Take it to a Verizon store and maybe they can Validate that you are in fact the owner of the phone & it wasn't stolen, and they can reset it for you.
You'll have to go into recovery mode and factory reset your device.
Shut off your phone.
Hold down the Home button while pressing the Power key. Keep pressing both buttons until the red Motorola Logo turns into a triangle around an "!".
Press both volume up and down buttons at the same time. The recovery mode menu appears. Use the volume buttons to scroll to factory reset option.
Press the enter button.
Your device will reset.
But key point is he/she will need their Google account information to complete the activation. Just doing a F.R. does notr make the phone usable - but will certainly "clear" it.
Just set up a new Google account.
Thanks to the Community for your replies.
Thanks to MrMRM513 for the reset instructions.
After a Master Reset you can set up a new Gmail account. Anything that was backed up with the old Google account (contacts or applications) would be lost unless otherwise Backed up. You can attempt to get the email address or password from Google by clicking here .