Hi. Welcome to justanswer.
Have you synced your device?
Unless you made a backup before you forgot your passcode, there isn't a way to save your device's data.
Make sure you have the latest version of itunes installed on your computer.
Turn off your ipad. Open itunes on your computer.
Now hold the Home button of your ipad. Plug the USB cable while holding the Home button down. (Make sure you have itunes opened on your computer while you plug in your ipad). Now you will see the Apple logo on your ipad's screen and it will go in Restore mode.
You can release the Home button and put your ipad aside.
Now on the itunes screen you will see an option of "RESTORE IPad".
(You will lose the data from your ipad which you can later sync with itunes. But if you have not synced the data, then I am sorry but you will lose all your data from ipad.)
Now itunes will extract all the data and you don't have to do anything.
Reply if you need further assistance.
Please rate the chat POSITIVELY so that I can receive my payment. Thanks