I see so many auto trans questions that's what I had on my mind. Sorry for not reading closer.
This is a simple job. Drive the car about 5 miles or so, the longer the better, to really get the fluid warm. Remove the plug on the side of the transmission first (the fill hole), then the drain plug. After it's done draining, reinstall the drain plug and fill it up using the fill hole, until the fluid just starts to run out of the fill hole.
I am not positive, but I believe the manual trans also uses ATF in it. I agree the best place to check is in the owners manual, it'll probably show the type of fluid as well as the quantity, but again I recommend filling it til it starts to run out the fill hole.