Hello lil-hunter:
Need info, markings,names any obivious info to know what it is.
As for the bore, there are a lot of products available to remove some levels of rust. IIRC, someone recommended a product named EEZOX for problem bores. I use JB compound or Kroil and a lot of elbow grease, flitz also works on them. If the bbl. is pitted badly then you may need a new bbl. however I have seen rifles with poor bores that were good enough for deer hunting at reasonable ranges, it may surprise you with a good cleaning. Hope this helps.
safety first
HM