400 Thb

Sorry, I have no idea about a shuttle. It is a short walk, only 15 minutes from the BTS.

Yes-mostly-There is an elevator but I am unsure if it reaches the ground floor or if it starts on an upper level. The overall grounds of the temple certainly are easily wheelchair accessible.

The Chang Erawan station is a couple hundred meters past the Museum site. It is an easy walk or one can get a free shuttle. I did not use the shuttle. Enjoy your visit....

I am sure this would not be a problem as there is a large reception area.

As far as I am aware it closes at 7pm but as it gets dark about an hour before that I would not leave it 'late in afternoon' to visit.

Ok I'm answering my own question abt parking at the Erawan Museum for others who may have the same question. Had just gotten back from BKK. If you are driving to Erawan Museum, the car park is under the elevated flyover. The guard there will give you a card to keep and there will be a buggy (like those golf buggy) to ferry you to the museum. The ride takes less than 3 mins. When you wish to return, the guard at the museum entrance will call the buggy driver on his walkie talkie and he will arrive to pick you up and bring you back to your car. Upon exiting the car park, return the card to the guard. It is free parking. No need to pay.

It is on Rt 3 about 12 Km to the north. You may find a White commuter van going north. Ask the locals at the temple they will tell you if there is a commuter van. It doesn't show public bus service in the area.

I was at Erawan museum in november. The price online is 400 baht and so is the price at the entrance. I just payed at the entrance and can not see any reason to book online. What`s in it for me ?? Wonderful museum, enjoy....

Take the Sukhumvit Line and get off at On Nut Station (or E9 Station) and go out through Exit No. 3. Then, take a taxi. Buses that go there : Bus No. 25, 102, 142, 365, 507, 511, and 536. I Got a taxi outside the train station, around 50baht. This is only a problem on the return. You have to cross the highway overpass, then get the stairs over the highway to the other side of the road. There are buses and taxis galore that will take you to the train (BTS)