Well bookmark the sites:
1. MacOSXHints and find out some old Unix stuff works with minimal tweaks.
2. MacWindows and they have been doing just cross platform networking since before OS X.
3.VersionTracker and/or MacUpdate - both are one stop Apple program download sites.
4. Accelerate Your Macintosh along with their excellent drive lasso. This site is the one stop for hardware hacking on your Mac.
As far as the sharing it will be a lot easier if both of you are on the IP subnet. Do you understand?
Mac Pro Dual 2.8 Quad (2nd gen), 14G Ram, Two DVD-RW Drives, OS X 10.8.3
2006 Mac Book Pro 2.16 (first Gen) OS X 10.7.4
2TB Time Capsule, 2 TB
32G iPhone 4S Black, iPad (3rd Gen) 32G Black