You really need a manual for a machine this powerful. there is too much to learn without one. C-tech has manuals here:
programming
http://the-checkout-tech.com/manuals/cashregisters/Samsung_SPS-2000_programming_manual.html
operation
http://the-checkout-tech.com/manuals/cashregisters/Samsung_SPS-2000_owners_manual.html
Registerman
September 2010