Edit you will get on the machine
* Mac OS X v10.5 Leopard (includes Time Machine, Quick Look, Spaces, Spotlight, Dashboard, Mail, iChat, Safari, Address Book, QuickTime, iCal, DVD Player, Photo Booth, Front Row, Xcode Developer Tools)
* iLife ’09 (includes iPhoto, iMovie, GarageBand, iWeb, iDVD)
Don't know what trial apps apple is loading these days
---
Look at MS Office Home/Student Edition it is $135 -- can test out with a free trial
Another alternative is Apple's iWork for $99 -- can test out with a free trial
---
Or a freeOffice variant like NeoOffice -- it is free if you are cheap or beerware cost
---
You should get a copy of iWork and MS Office trials to see which one will work best ... iWork isn't too bad, but you will need to learn to export the files when sending them to Windows users either as a pdf or word file.