Your mouse should work, did you specify it as a MS intellimouse during your (no doubt lengthy) install? If not we'll have to edit some files...
Assuming you've got an entry for your cdrom in /etc/fstab then simply type as root at a shell prompt:
mount /dev/cdrom
I assume you can drag the taskbar about, keep trying if not right click and go to properties I believe there's a setting in there.
Your printer will run via CUPS (if supported) lets get more basic things working first!
Btw KDE/Gnome on that kind of processor are just gonna cause you problems, they're to heavy, try something like fluxbox/xfce instead
cg