Never.
The Saturn S series vehicles used a timing chain instead of a timing belt. And the chain is inside the engine, bathed in oil to keep it lubricated.
The timing chain should be replaced whenever you rebuild the engine.
Yes, the front ends should be identical.
what is the fifference between a saturn sw1 and sw2
Yes, it should be perfectly fine to use ATF4 on your 1998 Saturn wagon.
Steps to changing the timing belt on a 2005 VW Jetta Wagon 1.9 TDI?
2 degrees before TDC
Yes but not one that's worth buying for a 1995 Space Wagon.
Yes it should be on the far right of the engine
Yes
The Subaru 2.5 L engine is a non-interference engine. If you change the timing belt when it should be changed you don't need to worry either way.
See link below
Change the fluid and filter every 36,000 miles.
What kind of cylinder?