Brake pads are similar to Legacy GT and I have already ordered Endless brake pads. One full set (front and back) around RM500+ in total. Not too bad. Ori i think around 800+ for the whole set of 4.
There are quite a lot of Subie mechanics around. The one that I frequent already preparing for XVs to pop by in future.

Main engine parts and CVT gear boxes of course expensive la, but they are covered by your warranty. But I never had any problems with engine/gear boxes even up to 100,000 km.
If you take care of the car well, it should be able to last a very long time.
Engine oil is 5.1 liter together with oil filter changed.