Well, you move around with the arrows [Up, Down, Left, Right] and attack with CTRL. The number pad's for emoticons. F1-F8 are for spells [I will get back to this!] F11 is to sit, and F12 is to refresh your screen.
2. What about the mouse? Can I still use that?
Of course! You can move around with it too, just click wherever you want your character to go. You can pick up items off the ground by double clicking them, and equip them by viewing your inventory [see one of the nice screenshots there!] and, again, double clicking it.