rubber links top front calipers need to be replaced at the designated service time irrespective to leakage...i still remember the day almost 8-9 years back when front link brust open while racing with prius at around 135km/h going under underpass on lahore canal road and brake pedal went all the way down...thankfully nothing bad happened except me returning home at 10 km hour speed and left sore hand..
u should get the complete rebuilt kit for rear cylinders and replace, dont know abt cost..
steering racks boots are there to prevent dirt and moisture from entering rack and ensuring long life of seals...replace immediately with original part...dont go for cheap local part...dont forget to purge air from boot else it with swell and deform with usage...
check PS reservoir for leakge...check the man big pipe going to wards rack for leakage...as the boot is torn i suspect rack seals for leakage..
for gear box check gear level seals and drain nut for leakage also check axle seals