Setting up wireless network

[Prometheus]

Okay so it seems I may need to setup Wireless Network when I move (I hate this of course since its too slow) anyway....

What do I need for it to have good range within our dwelling?

Security:How do I configure it for MAC address confirmation, WEP encryption, etc.

For MAC addresses how can I find out what my MAC address is and the other people I want on the network.

For wep encryption does it help to have longer alpha numeric passwords?
Anything I am missing?