^^^Agreed, obviously crusty to be sure.
I would scrub, massage and cleanup as best you can, mitigate anything life threatening and get it fully operational.
Ride, ruminate and evaluate how you really want to proceed.
Full DA, nice score, pretty cool.
DOH! If by frozen you mean the pedal won't spin then you'll have to swap out the crank for now but I would do everything you can to save it regardless.
