Car batteries are pretty well standardized. About the only difference is the location of the terminals - top or side. Other than that, get whatever battery you like (or can afford).
75d23l (12 v - 52 ah).....
The owners manual states 4.2 quarts. I use 4.5 to keep things easy.
134A
4.2 quarts
Take them out then put the new ones in
10 minutes or less
take out the old one and put in a new one.
Unleaded; minimum 87 octane for normally aspirated engine
Take the old one off, and install the new one. Dick.
The 2000 Subaru Outback has various wiper sizes based off of trim (sport is different than other trims). See sources and related links below for the wiper blade sizes by vehicle trim.
Take the distance traveled (X) and divide by the mpg (30)
2 hours with a coffee break. 45 minutes if ambitious.