MERGED QUESTION Question from Ricdundy : "Circumventing original email user and password"
After hard factory reset cannot add new account or address without forgotten previous information.
You locked i down to protect itselft. If you forgot or never knew the "previous information", it strongly implies you don't own the device and the system is protecting the private data of the real owner.
Your situation is a shining example of why we cannot and will not assist with password issues. What you have there is now a brick and you should hand it back to the owner or dispose of it.