Tin train cars had a variety of methods to couple them together, but by far the most common method was a coupler commonly called tab-in-slot. The tab from one car mated with a slot in the next. All of the train manufacturers used a variant of this method at one point or another, and all of them would be able to couple together, if not for one nagging detail: height.
For most of the 1930s and 1940s, Lionel used a latch coupler that was incompatible with the others–Lionel liked doing things like that–but they made a combination coupler for a while that had a slot in it to accommodate tab-in-slot couplers. Reproductions are available on Ebay. Get one of those for this car, and something that couples with the other cars you like to run, whether that’s an Ives snakehead coupler if you’re lucky enough to have a spare one, a generic tab-in-slot coupler, or another Lionel combination coupler.
But even when you change the couplers on the car, you’re still likely to have height issues. Here are some approaches to solving the height problem so you can run various brands of vintage trains together almost as effortlessly as people pick and choose between all brands of modern trains today.