H Squilter,
Billy has posted several tutorials on the Quilting Board which may answer many of your questions about cleaning your sewing machine. They are located the Tutorial link. (Go to Home then click on the Tutorial link).
Here is the link to Part 1:
http://www.quiltingboard.com/t-45816-1.htm
Part 2:
http://www.quiltingboard.com/t-45983-1.htm
Part 3:
http://www.quiltingboard.com/t-46696-1.htm
You can try a local sewing repair shop or ebay for a belt.
Let us know if you need more information and I am sure many will be able to help you.
Judy