Building my first fixie - Vitus frame

Hi All

I'm looking to build up a *fixed*, I have a Vitus 979 frame, and a few other bits that came with this bike, such as brake calipers/levers/forks/seatpost.
Need some advice as to wheels that would fit the 130mm rear wheel hangers.
Can you just buy *fixed* wheelsets or do you have to build wheels from scratch ?
Could I fit track hubs on rear&front wheels ?
Looking to fit courier type bars but at present the headset has a Stronglight spider installed, so how do i fit the headset with a higher stem to bolt the courier bars onto ?
Can I also fit a triple chainring on front ?
Any advice would be much appreciated.

better