If you're planning to run an FTP server on a windows system, Filezilla will be more than enough to get you on your way.
I'll be here to answer any questions you have.
Filezilla comes in two flavours, the server, which would be installed (of course) on the server hosting the files. The second, the client, can be used by any computers connecting to the server, but is not needed, as windows contains its own FTP manager itself.
Once you install the server, by default, it will let anybody access the administrator's panel, so the first thing you should do is set a password. (It is in the options menu).
Main thing to know in the main server window is that there are three main groups of buttons, options (general settings), users (needed to allow people access to your files), and groups (which are more advanced).
You will need to set up some users. If you have trouble, ask your questions here.