Spare key needed for Ford Ka Zetec 2013

[GeorgeFordKa2013]

Hi everybody 

I wrote a post where I describe my problem here:

but I will repeat the main gist to keep it clear and concise: 

I bought a second-hand Ford Ka Zetec from 2013 and was given just the master key. I want to get a spare key with a fob (flip key, lock/unlock buttons). My car's documents came with a little card showing both an electronic and a mechanical keycode and I think these are important for making/programming spare keys. When do these come in handy and who uses them? Can I show this card to a locksmith? Can I avoid having to deal with Ford (worries of hefty costs) to get this fob that I want? 

Thank for reading!