For the breakdown, look at our price table. We register or transfer your domain with the Internic, setup your account on our server, and configure the control panel for your account. Our email addresses are very flexible. You can set them up as POP boxes which store mail, email aliases which redirect mail to another box, or as autoresponders. One MB of disk space can hold several hundred text pages or images.
Most sites use less than one MB of disk space.
This is the amount of network traffic related to your domain. A large number of sites have less than 1000MB of traffic per month, but popular sites could use three or four times that. A true domain is when you get your very own unique IP address on the web server. Many hosts offer 'fake virtual' domain accounts, which means they fool most browsers into redirecting themselves to the correct directory on the server. This method only works with certain browsers, is not full featured and is not a professional solution.