movie rental
I rented 2 movies and they are in my itunes rented movie folder on my computer, but I don't know how to get them to my ipad.
iPad
If you connect the iPad to your computer and select it on the left-hand sidebar of your computer's iTunes (you can enable the sidebar via option-command-S on a Mac, control-S on a PC), and if you then select the Movies tab on the right-hand side of the iTunes screen you should be able to move the rentals to the iPad (rentals can only be on one computer/device at a time, so they will be moved to the iPad and will no longer be on your computer).