They ran lots of passenger trains. All northeastern commuter service, AFAIK, was run by Conrail before 1981, including SEPTA, NJT, MARC, MBTA, and Metro-North. The Northeast Rail Service Act of that year allowed CR to get rid of it's commuter services (most, if not nearly all, passenger service operates at a loss - usually a severe loss) and CR became a freight-only road. Obviously, before CR, various agencies ran the commuter service and in some cases, like SEPTA, the agency was around as a management entity before they actually took physical ownership of their respective railroad.