A nice thing about having an old (vintage or antique) Singer machine is that you can find out about your new old baby. It is fairly easy to research your machine online and a big part of the fun, learning on the way.
There is lots of online documentation. A quick Google search will bring up:
Yahoo specialist groups on - singer, vintage and antique machines
Quilting groups and forums have information too.
It can become highly addictive. It is so easy to become a collector.
Some people who have found a basic bargain machine take pleasure in 'finding' attachments and accessories to make up the original pack at time of purchase.
Identifying your machine by serial number will tell you when it was 'born' - the date and year, the model number and the batch allotment figure.