Hadn't heard of this brand of bicycle before. Either Shimano 600 or Shimano 105 biopace. (entire cassette and chain looks rusted to heck, must have been in someone's backyard).

Fix cost would be: tires/tubes/chain/cassette/brakes at a minimum I think, so not a $50 bike LOL... I would say $200+ total after repairs, but still not bad for an old steel bike, if you were a collector. Also re-wrap handlebars, probably.

Maybe more if you go for some loud tires, probably Panaracer GravelKing in yellow, if they have it.