The single most important factor in toy photography to me is lighting. Get the lighting right and you can take fantastic shots with an iPhone camera (as I've seen Deceptic_Optic regularly do). But it all depends on your budget. Imo an SLR is probably overkill unless you're serious about photography. And not just toy photography.

A fancy point and shoot where you can manually adjust the settings would be a better and cheaper bet. and you can use it for other things because it fits in your pocket. I always take our Olympus point-and-shoot over my DSLR because my DSLR is huge, bulky and annoying.

But to each their own. Hope this helps