Welcome, Lori.
You have a machine that is called a "15 clone," as it is based on the Singer class 15 machine. A manual? I found at
https://www.manualslib.com/manual/10...e-C877-15.html It is a low shank machine so pretty much any low shank feet should fit. I didn't look at the manual to see what accessories actually came with your machine. The bobbins would be metal 15 class bobbins and it will use regular 15x1 needles.
Have fun with it.
Janey - Neat people never make the exciting discoveries I do.