You certainly can recover, open the iTunes app on your iPad and touch the "purchased" tab. All you purchased apps will be there and you can re-download them all for free.
There is lots of good advice and info on here plus plenty of members all too willing to help with any problems.
You can download the manual for your iPad here http://support.apple.com/manuals/ and in iBooks search for "iPad user guide for" and you will find free comprehensive manuals for both iOS 4 and 5.
If you have other Apple products or are interested in other Apple kit then why not join our sister forum too at http://www.appleforums.net/
Finally, if you still haven't had enough, how about a video explaining about our other forums (note:you may want to play this at half speed but hey, why shouldn't Phil be excited about our forums!)
Look in the app store under purchases and at the top of the page press 'Not on this iPad' and it will show all the apps that you've purchased that aren't on the iPad