Activation lock

If you know your Apple ID and password, your device should be accessible provided you set it up using that Apple ID and password. Otherwise, review: How to remove Activation Lock - Apple Support

Without proof of purchase, Apple will not be able to assist.

Janette N. Said:

"Activation lock: My iPad was a gift so I dont have a receipt but Im the only owner. I have my AppleID and password. Thank you for your help."

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Troubleshooting the Passcode...

You must do so from through Apple Support. See the following...

Hold It Right There!:

Enter the passcode incorrectly too many times, and you'd likely be locked out for good. So, hold it right there, and refer to this link: If you Forgot the Passcode on your iPad, or your iPad is Disabled - Apple Support. It would be the one you've always entered. If you do not know it, then look for it in a location you may have stored it in.

If locked out...

Have any Proof of Purchase?

Unless you have the original packaging and receipt, you may be out of luck. If you do have it, however, then take this to an Apple Store, or an AASP (Apple Authorized Service Provider)! and they may be able to restore it. The reason for this blockage is all about Security & Privacy.