I no longer have a VIDEO camera on my iPad3!!!
Yes you do. Run the Camera app and swipe the "Video/Photo/Square" setting at the lower-right to "Video"
I can no longer scale and move my personal wallpaper
Yep, that's a bug from the other reports on the problem. For now, resize your wallpaper on your computer and then move it to the iPad.
AND to make matters worse: my entire music and apps library was swiped clean... "
I believe you're warned, as has been the case with every major iOS upgrade, that the content would be removed. It warned me on my iPad, anyway. Resync from your computer or redownload from the iTunes Store.