Gear Oil, API-GL4 of Fuchs or Liqui Moly. You will need 2.2L. It comes in 1L packing and will be good for 50K kms.
For Brake oil, any Dot 3 of Seiken, Fuchs or Liqui Moly. One bottle will be enough. It will be good for another 50K kms. There are a lot of fake Seiken ones in the market though. Do change the clutch oil too with it, its the same Dot 3.
Ask the mechanic to properly flush clean both the systems.
In Gear oil, if possible do mix the Liqui Moly MoS2 antifriction, it will really enhance the efficiency.
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