Venice - St. Mark's - Treasury, Golden Altarpiece, Museum

You will just pay for those entrances when there, there is no pre-booking option

Don’t know offhand what the tower fee (maybe 8€?) is but it is such a fantastic view from up there, I’d try to budget for it
If not the tower at S Giorgio Maggiore is a few euros cheaper- 6€

Christine:

Thank you for your help.

Do I have to stand on different ticket lines, one line for each venue/item. I am trying to avoid that.

I know that every place requires security, but I am trying to avoid ticket lines.

When I hand the church/basilica my voucher/bar code for my 10-minute slot in the basilica, will they ask me what I want in addition.

Thanks again.

The Bell Tower is 13 Euros...that's a lot! But I will consider what you said about the view.

Oh- 13 € is for a Skip the Line entry. Yikes! I would not pay that either.
Regular entry is 8€
http://www.basilicasanmarco.it/informazioni-per-i-turisti/orari-di-apertura/?lang=en

We did it around 6 pm I guess. We didn't wait long- this was end of August 2014 so who knows

You will pay at the entrance to each interior site inside the Basilica- museum, treasury, etc, not when you enter the Basilica.
As fas as lines there? Guess it depends on how many want to enter those sights that day. I'd guess a lot of tourists do not.