...I know Money is Tight! Instead of rebuilding the Old Calipers, (I) would buy New Calipers and Rotors. Go with the New. To rebuild old, may work(how well?), but will remain Old. New...You will always be ahead of the Game! Just My Opinion. Think of how Much Time and Money the Actual Rebuild will Cost You.
...By the Way, Congratulations!! Welcome to the Party! Just Try to get that Smile Off Your Face!
P.S. About Dis-Assembly...WD-40 is Your Friend!