You can get the bloopers on the SW: TPM DVD by going to the "Options" section on the first disc. Enter "11," "3," and "8" and they should appear. Of course, every player works differently so you may have to play around with it.
For the next set, watch the deleted scenes documentary on Disc 2 and they play during the end credits.
For the next set, watch the deleted scenes documentary on Disc 2 and they play during the end credits.