For built in: Open Photo booth or other webcam software. For USB, plug in it, then open your program.
To use a Logitech (or many other USB)) webcaminstall the Macam software which will enable the use of the webcam with Mac OS X. (See links below)
Applications>Photo Booth. The Photo Booth app will allow you to take pictures and gives the option to use filters also.
Every Apple product uses Safari browser
The best apple computer is the Mac Air powerbook, due to its light weight, compact appearance and ease of use. The mac Book Air retails for approximately $1,500.
To use a webcam with MSN on a Mac you need the latest version of Messenger. (See links below)
Yes. Some distributions, for example Ubuntu, ship a Mac-specific ISO file to use, due to the intricacies of Apple hardware.
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.
The Mac's built in camera will be used with any software that requires a camera. With a standard Mac the Applications folder will contain PhotoBooth, iMovie and iChat all of which will use the camera. You can add Apple's free FaceTime to chat with other Mac and/or iPhone users or some of the numerous other software titles (such as iStopMotion and EvoCam) that can also make use the camera. (See links below)
Logitech is a good brand of webcam that can be used with a Mac computer. Logitech makes high quality products for both Mac and Windows and it should be easy to find the brand on all the popular sites such as Amazon.
the power book G4 can use the Airport Extreme card.
I think that it wouldn't make a difference. The Mac Book Pro has much bigger speakers though so buy any of them