Is there a model train layout in the museum? If so what scale is it? And do they offer a dinner train?

There are at least 2 layouts that I remember, HO and N. No dinner train that I am aware of.

There are model train layouts in Danbury Railway Museum. All scales are represented. No dinner train is available however there are trains during several holidays and during the spring summer and fall.

No dinner train...very limited "excursions" back and forth in the railyard only. There is HO and O scale layouts if I remember correctly.

There are and also a static display of the facilities.