From the OP via email:

["Thank you very much for the replies. The top tube says "special" but i wasnt able to find any bianchi special being mentioned (officially) or a catalog. The Special was an early '80s (maybe 70s too) lowerend model along the lines of a later Strada LX. Where was this made to be distributed? The Special was U.S. market bike and I believe Canadian as well. Also has suntour shifters, front d, rear d, shimano brakes. That sounds like the original equipment. Chain rings and cogs are really rusted and not sure if it can be repolished? The chain certainly looks like a goner but if the freewheel works it should be OK, just give it a light spray with some triflow or some other oil (not really wd-40) The chain rings look OK. Or salvaged? But i will try my best not to change major components as much as possible and try to ride it. Thank you very much!"]

Keep us posted on your rebuilding/cleaning progress.

There are a few members around the LA area maybe one is close and if you ask they may be willing to help you with things like overhauling the BB and the headset etc.