Cattedrale è cripta, cupola, battistero, museo. Io sono stata fortunata non ho fatto code lunghe quindi non saprei aggiungere altro.

Yes

No. In some areas you may stand off to the side and let others pass but the corridors are narrow and there’s two way traffic going up.

We were there in December, not a high touristic season, so we bought the ticket right there. The ticket was 18 euros as i remember, and it lets you to enter six places, church(Duomo), Capella, Baptistery, Santa Reparata, Museum dell Duomo, Giotto's Bell tower during 72 hours. But you can enter every place just once.

Ciao grazie ad entrambi; ho provato le due app ed ho preferito ITGUIDES PER vari motivi. 1 Si sente che e' realizzata da una vera storica dell' arte e l' audio d' molto appassionato e coinvolgente . 2 È molto interattiva , mi ha seguito passo passo prima all'esterno e poi all' interno come se una guida in carne ed ossa fosse stata con me

Добрый день! Билет отдельно на купол приобрести нельзя, только единый билет (Battistero di San Giovanni, Museo dell'Opera di Santa Maria del Fiore, Cupola, Campanile, Museo e Santa Reparata), стоимость 18 евро, плюс 2 евро - при покупке на сайте Il Grande Museo del Duomo. Вход собственно в Собор - бесплатный. Удачных прогулок!

Yes there are these pics on the dome

Yes, no naked sholders or legs

As I have seen the main queue is always bigger for free entrance in the cathedral. The queue for visiting the ruf of cathedral is smaller and I have seen is forming on the left side of cathedtal somwere more on back side where is another access door.

I do not remember seeing audio-guides. However, inside the Cathedral there is a table offering "free tours". These are done by retired volunteers who are usually very passionate and very well informed. The table is very nondescript and at the top of the stairs to the crypt (which I believe does come with an audio guide in English).