My dad had two Lionel trains: a 1666e and 1666. On a recent trip home I packed up the 1666e, brought it back home with me, and eventually took it to a local train shop to get restored.
For a few Hamiltons I got the locomotive, tender, and transformer up and running. For another $20 I got the track and pins needed to get a decent sized oval.
The only thing left to do was set up the track, tack on a couple other cars, add my son to the mix, and throw the switch.