Need help lost brakes

Probably you have air in master cylinder after it sat out disconnected, and needs to be bench bleed. Before you yank the master cylinder out for a bleeding try this little trick:
Pop the cover off master cylinder, and make sure both bowls are topped off with fluid.
Using your hand, slowly pump brake pedal down no more than 1/4th of its travel, and release it. Slowly repeat this genital action while a friend observes the fluid in bowls looking for bubbles. Continue until bubbles no longer can be produced.
Re bleed all wheel cylinders & calipers starting with most distant from MC working to closest. Do not fully depress brake pedal to floor during bleeding procedure, and keep fluid bowls topped off.