iTunes 10.6 is a computer application and not an app for an iPad. If you already have iTunes on your computer start it up and check to see if there is an update. If there is a later version download it and install it on your computer. Then you can use iTunes to sync your computer with your iPad.
The iTunes on your iPad is a different app used for music, etc. it does not do anything as far as syncing your iPad with your computer.