http://www.sewingpartsonline.com/husqvarna-viking-1--sewing-machine-parts.aspx  Here is a page of feet that will help you identify those you have.

http://www.sewingmachinemanual.net/Sewing_Machine_Manuals/viking/Viking.htm  Check this site for your needed manual.

Is there something specific you need to know? I have one model below this that does everything the same but does not have the embroidery.

I had this machine...it still lives packed away in my closet. It stitches beautifully. To use it for embroidery it needs both a card which replaces the current one on the front and a PCMCIA-type card which fits into the slot facing down. It also needs the arm to hold the embroidery hoop. While I haven't used this machine in a while, I'll be more than happy to answer any questions you have.