Don't remember password for ipad

You don't need to know your password for the iPad. As long as you know the password for your iTunes account, you used to setup the account on the iPad for. Connect the iPad with the computer and open iTunes and give in the password for the iTunes account. Apple will unlock the iPad and you can setup a new pass code for the iPad.
When you forgot your iTunes password, you have to contact Apple and prove you are the legal owner of the account.
Use this link to find more support for that:
Apple ID Support