Megan,
That Brother is a Japanese made machine from the 60s or the 70s. Not "OLD" at all in the scheme of things.
It is very worth refurbishing back to life. Remove the top cover ( two screws ), open the face plate, and start oiling it with Tri-Flow. Clean it as needed, and check for thread wrapped around the bobbin, needle bar area and other places.
Those are good strong machines. I have a couple and they sew very quiet and smoothly.
Joe