Well you could go to Teen Murti, Lodhi garden, Nehru Park, or even drive towards India Gate and explore its surrounding areas.

Not really. Actually the rail museum entrance is from the residential area and there is single road. In the normal days, there shouldn't be any parking problems but when you are going on a weekend & holidays, then there can be parking problems as you need to wait for long time to park your car. The parking space can park almost 100 cars and after that there is problem. I have faced the similar problem but can be manageable as it is worth visit.

No, it is not available at the museum. You may want to bring your own.

Not sure about it being INR 30 but it was less than INR 100. Don’t know about the trains.

Rail Museum is located near the Dhaula Kuan Metro Station. It is located at a distance of 2 KM from the metro station, hence you can board an Auto Rikshaw or a bus from the museum in order to reach the museum. You can also take an auto rikshaw from the INA or Jor Bagh Metro station. Race course metro station is the nearest for the yellow line.

It depends if u want to visit the museum 1 hour is OK and for taking pics with the engine and take a ride with toy train 2 hour is OK

Yes. It is closed on monday. The timings are 9:30pm to 5:30pm.

You can get bus service number 781 from Dwaraka sec 16c bus stop near ggsipu and from there museum is 16 Th stop.

No Specific Metro close by, but nearest would be Jorbag & INA.