Tour lasts about an hour. The museum can take all day if you want.
Self guided, so you can take as much time as desired. I only had an hour to spend bit was able to see everything without feeling too rushed.
As long as you would like. It it self guided so you set the pace.
Don't forget the gift shop that got a lot of cool things in there. Afterwards have some of those cool Donuts across the street
The docents are very knowledgeable about the history and the trains.
Thanks! Your answer is awaiting moderation.