Or just download the excellent and free NeoOffice. It's MS Office compatible, and open source.
By Airport, I think you mean Time Capsule. This is the Apple box that you back up to automagically. You *can* access these over t'internet, but not by default: see http://theappleblog.com/2009/05/14/access-your-time-capsule-over-the-internet/
Myself, I've been a professional IT person for aroudn 10 years, mainly supporting PC stuff. I now run a 17" Macbook Pro with Snow Leopard at home, and occasionally boot it into Windows 7 for games.
Any specific questions, PM or ask away!