i'm somewhat new to linux, but i'll try to help.

you need samba to get the fileserver talking to win machines. google samba for configs and commands.:)

networking printers: if you can hook them...

i'm not sure if i'm understanding what you need. it sounds like you say you want to "run windows applications" in linux. you're probably going to need to learn a lot more than how to mount the...

are you currently using a hosting service for you site? if so, how much do you know about webservers? you may be in for a headache if you haven't run a webserver before, regardless which os you go...