How much film do I need (in feet/meters)?
4,051 feet of film.

For reference:


8mm = 80.0 frames per foot
Super 8 = 72.0 frames per foot
16mm = 40.0 frames per foot
35mm 2-perf = 32.0 frames per foot
35mm 3-perf = 21.3 frames per foot
35mm = 16.0 frames per foot
65mm = 12.8 frames per foot


The math: 


  60 minutes = 3600 seconds, 3600 sec x 24 fps = 86,400 frames, 86,400/21.333 = 4,050.06328


Tools for Calculating

Kodak makes a free app for iOS called "KODAK Cinema Tools" which has a film calculator, among other features.

http://motion.kodak.com/US/en/motion/Tools/Mobile/index.htm

Panavision has a simple website with a film footage, frame and running time calculator:

http://www.panavision.co.nz/main/kbase/reference/calcfootage.asp