Vintage Panasonic Road Bike 22.5" (57cm)

I bought this vintage road bike approximately 10 years ago and paid $600 or $700, at Mac Talla cycles. It was originally purple with drop handlebars, but I spray painted it black and added new handlebars. It is in rough condition right now. The crank needs to be replaced, it needs a new seat and rear tire tube, rust, plus some other attention needed. It's been exposed to the elements and needs some rust-proofing spray paint at the very least. Frame size: 22.5" (57cm). Wheel size: 28-inch (700c).