Yes. All automatic transmissions have a hydraulic pump to engage the gears. Saturns are no different in that regard.
Check
Yes
== == In the fuel tank.
Check saturnfans.com forums under the SL or post the question.
See saturnfans.com
Inside the transmssion
They are usually located down on the side of the transmission.
There is none.
Which motor do you have SOHC or DOHC?
If it is an automatic, it goes down the red dipstick tube.
Under the battery tray
No You have to drop the tank have fun