Mon Nov 12, 2012 2:50 am
Hi, welcome to the forums.
The Raspberry Pi usually runs one of the various distributions of Linux, most commonly Debian Wheezy with the LXDE Graphic User Interface (GUI).
I do not know how well LXDE works with keyboard navigation only. I do think it requires a mouse. If you are good at linux, you could probably find a GUI that worked well without a mouse.
If you are going to do nothing but use a command line interface via a terminal or ssh, you can live without a mouse.
The cheapest usb mouse works fine. You can probably get one at a second hand store for a dollar/pound/euro/franc/etc so I would suggest getting one even if you do not plan to use it.
Cheers.