Given old IPad but can't sign in with my ITunes.

A friend gave me her old iPad. How do I remove it from her account and add it to my Apple account?

I Can't get into it at all. She had erased everything on it and it wants to run a fresh setup. It won't accept my iTunes login though, it's wanting the one originally used with the iPad, which she has no idea what it is. So there is no way to turn off the find my iPhone issue.

She bought a new iPad because she couldn't remember the iTunes login or the email to retrieve a password, which was most likely the login too.

😕