I have a 97 sc300
I kind of searched with not much luck other than a guess of 2 liters (4 motul .5 litter bottles)

I was wondering how much brake fluid i will need to bleed/flush my brake system when i put on my supra brakes.

Thanks in advance

 

2 litres sounds quite high to me......is the capacity not mentioned in your owners manual?

My guess would be in the neighbourhood of 2 pints, not litres.

 

Depends on how much air gets in the system. I would think four, one-half litre bottles should be plenty for the total bleeding operation. Use what is opened, as the fluid has a open bottle shelf life. If you use a pressure bleeding system, expect to use more than a vacuum based bleeding system would. Just be careful not to allow the reservoir to run dry. You may consider capping off the brake lines when disconnected to minimize the amount of existing fluid drain, meaning less air allowed into the system..