Thanks for your further inquiry.
Unfortunately, we cannot provide you your iPad serial number as that is information you would have to go directly to Apple Inc. for.
JustAnswer.com is not associated or affiliated with Apple Inc. in anyway, therefore we cannot provide such information on your personal Apple product inventory.
What you are going to need to do in order to have that information sent to you regarding your iPad serial number, is to contact AppleCare Support
(available Mon thru Sun - 6AM - 6PM -Pacific), for further assistance.
Regarding your iTunes account, you can contact via email iTunes Store Customer Service
to see if they can assist you further regarding your iPad, through your iTunes account.
These are the final options I can provide you, as the next step to aid you further in this matter, is to contact AppleCare or iTunes Support.
Thank you for allowing me to assist you as much as I could.