Gary, about transfering files.
You can file share with an ethernet patchcord between the two machines.
Older Macs would need a router, switch or crossover cable. The new Macs are auto configuring, so you don't have to spend the high price for a crossover cable. If you have, or get a plain patch cord, you can use it later if you decide to get a router or switch so you can network other devices (printers, other computers or modems).