Is Cubase VST 3,6 useble in 2016?

Hi I am new in MIDI as a guitar player so help me with this pleasse!
I can buy original verson of Cubase VST 3,6 version complette with the dongle so my question is would the software work regardless of being registered or not? Do I need a code to install it or is the dongle enough?
Another question is what are the requirements in a way of computer and software?
Thanks TTT. :smiley: