Hey Joey,
Welcome to Apple Support Communities.
It sounds like your iPad has Activation Lock enabled on it, which is described in the first article linked below, and you’re running into an issue activating the device because you Apple ID and password information isn’t being accepted.
iCloud: Activation Lock
This article will walk you through the process of changing your Apple ID password and updating your email address:
If you forgot your Apple ID password - Apple Support
After you change your password, we'll ask you to sign in with your new password the next time you use your Apple ID. If you want to, you can update your email address or change your Apple ID.
So long,
-Jason