No when we arrived in the morning that had volunteers walking around answering questions. When they stopped playing the organ that gathered who was there up front and gave a short talk on the church. No formal tour.

Yes, they have docent tours. We were there on a Friday, and they were starting one about 1:00, just as we were leaving, lol. Don’t know how many a day they have.

Yes

Not inside the church. However, I'm not sure about service dogs. That might be permitted.

no I would not think so, it's a "working" church and since only service dogs are normally allowed in a church I would think the same would apply here.

Sorry don’t know.

Based on what I saw, there is no dress code. There was a great mixture of folks attending the mass (5:30 on Sat. night). Some of the did suits, but most had either sweaters or winter jackets. I wore jeans with a sweater and I fit in fine. The major issue is parking on the street. Only solution is to get there early. It is a beautiful Cathedral !!

Not sure. You should check their website.

There was a midnight Mass. Residents of Savannah told us that you have to arrive very early as the number of people are attending and late arrives end up standing outside for the Mass.

530 pm mass.