Thanks. The Ebayer I purchased from was definitely not a dealer but the train set did come complete in the box. I will check into the couplers. Any suggestions to someone brand new to trains?

My young son has recently taken interest in train sets. So, I ordered one off of Ebay that was supposed to be HO (what he wanted) but when it arrived it ended up being N. I cannot find ANYTHING about this set anywhere. We want to keep it but the hook that connects the engine to the other cars is snapped off so we have to run the train with a backwards engine. Does anyone have any information on this set? Any ideas when it was made or if we got taken? I paid $44 for the complete set but like I said, the engine is not 100%.