The mac should run straigh off....if not look under internet connections or lan or something.....
Static ip.....dont you have DHCP enabled on the router.....it should autmatically be assigned...
Static ip is an ip that you assign by force to your computer....
if its on default or almost default....you can try something like 192.168.1.125 ...or some such....
You have to connect through the router as a gateway....not to the router.......
If you want to share files between the two, you can actually make the mac do an smb mount.....and share files across the pseudo network...