Would a backup to PC backup data?

This is why you should never JUST rely on "cloud" (remote offsite server storage) alone.

So let me understand this.

The whole time you have had this iPad, you never, EVER connected it up to your computer to sync and backup your data to iTunes?

And you recently discovered that your iPad wasn't backing up to iCloud, either?

You never bothered to even check all of this time to see if iCloud was storing your iPad's data backups?

iTunes does, certainly, save all app stored data and all app stored documents.

You waited to do a backup to iTunes when your iPad became seriously problematic and glitchy?

It is, definitely, possble that your iPad was glitchy enough to not do a complete backup to iTunes.

That is possible.

There is a very high chance/probability that iTunes did not save any of your data from your iPad and it is now gone.

If you did a restore of that incomplete iTunes backup, I am sorry to say, but the data is gone from your now Pad, too!

If you hadn't tried to do the data restore, there would have been a chance that all of your files would have still been on your iPad.

As soon as you did the inconplete restore, you destroyed the previously stored data that was still on your iPad and it's gone.

This is why you need to make more regular backups to a more stable location for any mobile device.

A mobile computing device is NOT a permanent place to your store important data to.

These devices are not as matured, stable and robust enough technology as a full blown laptop or desktop computer to trust for long-term data storage.

You need to have, at least, one other more robust and reliable source to store your important and precious data and images that you never want to lose.

Even on a more robust computer, you need to have/should have a backup of your important data on your computer, that you never want to lose, in case of hard drive failure or some other computer failure.

FYI, cloud storage is fine, still much better to save to a local source like a computer or WiFi enabled portable and external hard drives designed to use with mobile devices.

These are available from Seagate or Western Digital and there is even a new WiFi enabled USB Flash drive from SanDisk called the SanDisk Connect that comes in a variety of storage sizes that works with any iDevice.

Things to consider so this never happens to you ever, again!

Good Luck!