1) You can follow the directions
here to make a grub boot floppy, or else download the
Ultimate Boot CD, which should have a grub boot floppy on it.
2) What are you using? KDE? Gnome? I've never used netcardconfig, so I'm not sure what it is. If you're using KDE, try
apt-get install kdenetwork. On Gnome, try
apt-get install gnome-nettool. Hotplug should take care of finding your card. One of these other should take care of setting the /etc/network/interface file.
3) I believe you install cups and then in your web browser type
localhost:631 to configure it.