No, you can purchase at the door
No
Remember that the museum is normally packed so you will be in a long line. At a point while in line, everyone in line could be asked by one of the employees to pay am extra 10 in order to skip the line and go in. That is per person
You can do either or and its only $10 dollar which is cool. I thought it would be more but its not.
No , you can buy tickets there.
Nope you can purchase at the venue.
Thanks! Your answer is awaiting moderation.