answer1.
i used to drive jazz and i change the above parts is around 800-900 hkd (including parts and fee) so i think your garage is quite expensive. (ps, if u change the above parts, change ignition parts (for chui). u will feel the car is more smooth.
answer2.
the brake is around $150-200 and the brake oil is around $200, the worker fee is around $200.