Hi Cindy!
If you are not an annual pass holder, or a Walt Disney World resort guest, the parking rate is currently $14 per day per car (subject to change). For each day you pay to park, keep your "stub" and use it to park at the next park without paying twice in the same day. Parking is free at Downtown Disney and at the water parks, too, so you'll catch a break on your visits there. Currently there is not a parking pass.
Hopefully, this helps you in your planning! The Disney site currently has information
here regarding transportation, but without the details you are looking for, it directs you to call for more information. For a bit more information, try searching "parking" over at allears.net.
Enjoy your magical vacation!