Well, good news! I rethreaded the bobbin, rethreaded the top thread, and it sewed just fine! I opened up the top and the bottom and other than being a bit dirty, it looks good in there. The cord is good, no fraying, etc. I'm going to give it a good cleaning, both inside and out. With all of the parts, I think I'll chance the donation. It won't get used much because my purpose in having it is mainly to have a backup for when my main machine is getting serviced. Of course, I'm going to go back often to that thrift store and see what they get in.
I truly appreciate all of the advice. I'll update as I use it and see how it holds up!Schedule