Unfortunately there isn't anything we can do. You have to know the password to bypass the activation lock. I'd assume it is asking for the Apple ID password if you've restored it through iTunes. If you don't know that you can go through the recovery steps at iforgot.apple.com
For security and legal issues, there is no way to bypass that if you are not the owner of the account or if you don't know the password.
If you are the owner you still have hope, you can recover/reset it by doing what the poster above said.