I have over 100K on mine and never changed the brake fluid. I have no idea about the engine mounts, but mine are the original.
Rear wiper can be purchased at walmart for about $8. DYI
I would not pay $120 to charge a battery that cost about the same or less new. If you are not having issues starting, I would not change.
Belts might be worth it. They are a pain to get to.