Hi there,
You seem to make the classic mistake: Minarelli has nothing to do with 'Moto Morini', but will try and give you an answer anyway
)
The UGM number is the Italian homologation number. This means one prototype, built exactely the same was approved by the Italian officials.
Then all other models like that one were allowed on the road, but had to use the homologation number to show they were approved.
You should try Mr. Cesare Resta in Italy,
http://www.motomanuali.com/ for documentation on your bike. But send him a picture. He speaks/writes English. There is another good website where you could ask questions about your Minarelli:
www.mopedarmy.com
The peddles were quite common in the 70s in Europe. A 50cc moped was considered a "bicycle with supporting engine". So normally if you switch
into gear and keep the clutch pulled you should be able to use the bike as a bicycle. Of course it is heavier and the gearing to use it for cycling is not so good.
Normally you can start the bike when there is a spark on the sparkplug. If the carburettor is clean inside and you have petrol (= gasoline) mixed with two stroke oil in the fueltank (not sure to what ratio this mix should be), use the choke, gear in neutral and just push the peddle forward. There should be a (push?)switch somewhere (on the handle bars??) to switch off the engine.
I don't know how long this bike was not used. If it has been standing for a long time, the petrol might be "off". Make sure to first change the oil in
the engine and put fresh petrol in the tank, but as it is a 2 stroke, oil should be added. Find out the correct mix first. Also, old petrol can block the petrol flow and can block the carburettor inside. It should be cleaned out by a mechanic who knows what he is doing.
If all of that is allright, you could tow it behind a car: switch into 2nd or 3rd gear. At 5 - 9 miles per hour let the clutch come up and the engine should run.
If you have the original brake shoes, you can get new lining done by a specialist.
Hope this helps.