I just checked in the internet and it says that there is a technical stop from 7 January to 4 March. You can find the exact days according to season. They are different in the summer and winter.

Funny you ask, my friend and I discovered the museum by going up a completely different way then the stairs in front of the fountains. There is a back access that has escalators that take you all the way up to the museum and we went down the stairs when we were leaving. So if you are facing the fountains you take a left and walk down and then a right, something like that. I think there might still be some stairs that you might need to take to get to the escalators but they aren’t as many! Hope that helps :)

Yes, moreover we came around 14:30 and entered for free. Keep in mind that all people somewhy queue at one entrance (in the inner yard) whereas there is absolutely queueless entrance from Ronda de Atocha street ; ) Enjoy!

Да, из самого здания тоже можно подняться вверх по лестнице.Спросите, как пройти у администраторов на месте

We bought a Barcelona card 5 day pass and didn’t have to book a time or day we just walked in and it wasn’t busy. I don’t know about changing a booked time.

No Idea about it. Talk to them. It is difficult to reschedule.

Κάπου στα 10-15€ είναι αν πας μεμονωμένα... Εμείς πήραμε το museum passport που σου δίνει πρόσβαση σε 6 μουσεία και πληρώνεις γύρω στα 45-50€...δεδομένου ότι κάποια μουσεία είναι πιο ακριβά από κάποια άλλα...αλλά σχεδόν κανένα δεν πέφτει κάτω από τα 10€, συμφέρει...ακόμα και σε 4 ή 5 μουσεία να πας και όχι και στα 6, πάλι συμφέρει γιατί γλιτώνεις τις ουρές και περνάς κατευθείαν με αυτό το passport...

No, puoi entrare tranquillamente.

The terraces in front of the museum are open to all, you only need to pay for admission to the museum itself. The terraces give great views over the fountains, especially when the Musicam fountains are playing.

Добрый день. Пришли наугад, была живая очередь. Аудиогидом не интересовались, поэтому не подскажу.