MK1 brake help

[Phoenix]

right saturday night my brakes failed just outside my town. at 60ish....the brakes had been soundind strange for a lil while as if the discs were warpped. was booked in to have them done next thursday. garage says that i probably ran out of brake fluid n have a split in the brake lines somewhere.(cant think how) my car hasnt moved from cark park for day i moved it today to another place and this almighty kinda low toned noise happened every time i moved the car and the car felt so stiff to move as if the brakes were on...
is this what the garage thinks it is? when i pulled up trying to brake the car felt as if it was pullin in one direction.
also where is the brake fluid thing in the RSi engine bay?

cheers
Si

 

[rctempire]

Should be on the drivers side at the bulk head. 4 pipes come out this section and is a large metal silver object. Check the fluid there, but if there is fluid in the system the master cylinder may have failed.