According to salary surveys conducted by the National Association of Colleges and Employers (NACE), mechanical engineering graduates with a master's degree earned an average starting salary of $66,158 in 2009 and $69,954 in 2010.
There was more fuel on-board for the auxiliary propulsion systems and for the various modules, but the above was the fuel used to get the payload into space and to the moon. That's a total of 3,787,350 liters of fuel, or just over 1 million gallons of liquid fuel with a fuse! Wow! Of interest: Europe is preparing plans to join the U.S. in building a manned spaceship that will take men and women to the moon.
Robert Frost has mentioned about the travel times (4.5 days and 3.5 days, from earth to moon, from moon to earth respectively). I will venture to answer your other questions. The return trip to earth requires less fuel as it is the heavier body and hence its gravity is much stronger.