Miriam and Crosstitcher: Yep, think she needs a friction wheel. I was able to open it up and look inside, and it definitely has a flat side on it. Otherwise, it seems like she moves well, just has been sitting for a long time.
I found online at White Sewing Center where you can get the friction wheel with instructions and a tool rental to get out and back in. I wonder if anyone has done this before and how complicated it is to replace?