Dear guzzio,
be welcome at Stridaforum!
Naturally I do appreciate your enthusiasm and many thanks for the pics. 
Please may I suggest that you first use the forum search (upper right corner) and the term “MK1”, the hits will most likely answer all of your questions.
Unfortunately I can’t recommend to ride this bike - most likely you will not be able to find any spare parts.
(Exceptions are some parts from newer versions and complete “spare bikes”.)
Sorry, but I’m studying Strida for just six years, actually I’m not familiar with MK1 versions…
Good luck!