Futurama-type?!?!!? Hell, animation of that calibre usually takes an army of animators months for each and every episode! To see the limits of what is humanly possible for one man, have a look at
http://www.xombified.com .
Oh, and if you really want tutorials, this link may help you on your mystical journey:
http://www.pixel2life.com/tutorials/...t=12&subtut=53