Need info on server stuff

I have gave in. I can not find a server that suits my liking. But My parents run a web hosting biz not very popular. But anyway i would like to run a Server but they want all the info on it like.
1: How much bandwith is aprox used per zoneserver
2: How much space will be needed
3: How meny zone servers are recommended
4: How much Bandwith is used total
5: What progs will be needed in all
6: Are they stable


If you could give me all the spics up there and any i have forgoten thanks by the way if i can run it it will probly be run a a T3 Maybe higher