You have been told numerous times about recovering your password. If you do not remember the Apple ID used, then there really isn't anything you can do. You are responsible for saving this information. If you are the original owner of the iPad, then take the iPad, the original receipt to an actual Apple Store and ask for help. If you purchased the device used/second hand, there is nothing that can be done.
Please stop posting duplicate threads, you are going to get yourself banned from the forum if you continue. Asking the question over and over is not going to change the answers you have already been given.