Brakes fluid changing

When do i need to change my master cylinder (brake system) for my acura vigor gs 1992 ? How can i know my old master cylinder doesn't work or still works ? How can i refill brake fluid for my brake cylinder ? What kind of brake fluid is good for my acura ? My dad refill master cylinder (brake system) by transmission oil, so what do i need to do with it now ??? Thanks a lot !!!

you're in trouble...

you'll need to replace everything! master cylinder, brake hoses, calipers.... everything