Using this 1978 On3 scale steam locomotive is quite straightforward. Since it's an analog DC - only model, you'll need to connect it to a compatible power source. You might notice it needs a slightly higher voltage to start, so adjust your power supply accordingly.
When it comes to handling, be careful as the boiler leans a bit to one side. Don't apply too much force while moving it to avoid further misalignment.
For maintenance, keep an eye on the wheel wear, which is currently minimal. If you plan to use it for a long time, consider upgrading the drive as it could benefit from it. Since the model is unpainted and has some tarnish, you can clean it gently with a soft cloth to maintain its appearance. Store it in the original box and foam when not in use to protect it from damage. And remember, this model is sold as - is, so handle it with care to enjoy it for a long time.