Here is a web site that should help you.
http://forums.macrumors.com/showthread.php?t=307821
All Macs come with AirPort WiFi built in which conforms to standard IEEE 802.11 protocols.
Most desktops come with a built in screen (all in one piece) but if you get a Mac Mini, which doesn't have a built in screen, you can use any monitor, it doesn't have to be Apple.
Yes it does.
The MacBook, in common with all Macs for some years, has an Airport WiFi card.
ethernet, USB, Firewire, bluetooth, WiFi, and on older models, Infra Red.
Mac Mail or just Mail as Apple refers to it comes preinstalled on all Apple Computers.
Apple Technologies.
Once you have your WiFi network up and running, give the network a name, just turn on your Mac and then click System Preferences > Network and turn the WiFi on. Your Mac will pretty much do the rest and will connect the the network.
the Mac Os X 10.000 will come out this summer/fall (about). it will be called Lion.
The Mac's built in web cam is controlled by software so launching PhotoBooth, iChat, FaceTime or iMovie, all of which come with a Mac, will activate the camera. There are numerous other applications, such as Skype, Messenger etc., that will use the camera.
Apple wanted to be the software, and hardware company. That way Mac OS X is built for the Mac computers.
It came out January 22, 2005.