iPad not appearing in iTunes
http://www.apple.com/support/ipad/assistant/itunes/
iOS: Device not recognized in iTunes for Mac OS X
http://support.apple.com/kb/TS1591
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/TS1538
iTunes for Windows: Device Sync Tests
http://support.apple.com/kb/HT4235
IOS: Syncing with iTunes
http://support.apple.com/kb/HT1386
Apple - Support - iPad - Syncing
http://www.apple.com/support/ipad/syncing/
If iPad appears as camera:
See 1st link above.
iOS: Disabling digital camera notification in Mac OS X
http://support.apple.com/kb/TS1501
iOS: Disabling digital camera notification in Windows
http://support.apple.com/kb/TS1500
Cheers, Tom