I use a bluetooth dongle, a usb device that just plugs into any usb port. I use it both on an IBook and my main P.C.
If you use a dongle then it should come with software to install on the computer. The phone should also come with software ( or you may have to download it from the phone website) so the computer and phone can communicate with each other.
It should be a simple matter of installing the bluetooth software on the computer, inserting the dongle into a usb slot and then this half should be ready. The bluetooth light will keep flashing. What it is doing is looking for bluetooth devices.
If you then install the phone software onto the p.c. and bring your phone within reach. Set the phone to bluetooth and the p.c. should recognise it. Then both phone and P.C. will ask for your permission to talk to each other. You must authorise both, security thing.
You should then be able to swap photos, files, messages, e-mails. Basically any thing the software of the phone allows.