61 Brake Questions

I just got a call from a friend who has recently acquired a 61 Imperial. He had a couple questions regarding the car that I couldn't answer positively since I don't know much about the 61s. His first question was about brakes. The car has been sitting along time and doesn't have any. He said he can't figure out how to put in fluid. Is the master cylinder under the brake booster on a 61? If so how does one fill it? He also said that the transmission fluid is yellow. Isn't that just the type that was used at that time? If so there isn't any problem changing it over to Dexron is there?

Any help will be appreciated. Also this car may be for sale soon. Seems my friend bought it for someone else who only wanted the engine. Now this person doesn't have any money. I think that may be a good thing. Its not a 56 but it would look good with my 62.