It sounds like there's nothing directly wrong with it but mosty a case of sorting out threading, cleaning bobbin case, reace hook, feed dogs, needle in correct way, etc. It looks like this model has everything you want in a vintage machine; all metal, smooth running and capable.
Have the machine out on a table, spend the next few days sorting it out; detecting all oil points, clean out all lint, fluff thread, parts of broken needles that might turn up. This means, take out the bobbin case, uncrew the needle plate, inspect all moving parts under lids and covers; turn the hand wheel, move knobs and levers; every where, were metal touches metal needs a few drops (repeat it the next few days and run the machine inbetween).