Trouble with old sewing machine

[rendoman]

Thanks for the history note, i didn't know!
I'm searching info, Vigorelli factory is closed and there are spare parts for recent production.
I'm searching for old Singer manuals (similar in shape) like for example the model 15-91. I have to find an old singer with more or less the same operation and study how to operate. Luckily old tech papers are easy to find but since it's my first time with sewing machine, I don't want to make a mess and find myself with a bunch of pieces on the table

The good old local shop of sewing machines closed few years ago, I went to another one that told me to buy a new one, because repair my old vigor cost much and not worth it (this without seeing the machine).

http://parts.singerco.com/IPinstManuals/15-91.pdf

http://parts.singerco.com/IPinstManuals/66.pdf