ONCE you sign up for a tour, they will provide you with details as to where you can locate the tour. I suggest getting to the Vatican at least 30 minutes prior to the tour, and on the LEFT side of the Vatican, there is an information booth where you can ask for the specific location of the Tour. We actually asked one of the Vatican guards who then pointed us in the correct direction. The tour for us started on the Left Side of the sweeping columns. The tour has a check point where you first show your passes to a guard who then validates your tour and allows you to stand and wait for the proper guide to show up to start your tour. If you need any additional information, please don't hesitate to contact me. Enjoy!

Yo la hice en castellano y la visita la hacen también en castellano

As far as i know, you must write the excavations office to ask for place on tour. I never heard of a company offering it.

We wore jeans but if you visit the excavation during a warmer summer month and want to wear shorts, I'd reconsider. Also, once you enter the underground area, the temperature drops considerably and even a long-sleeve shirt or sweater would be desirable. But jeans are okay. SHORTS? not so much.

No se pueden hacer fotos, ni con móvil. Otra cosa es como todo q las hagas y no te pillen. Me contestaron al día o dos días cuando pedí la cita, pero si pides información no te contestan al menos a mí.

Nosotros no tuvimos ningú problema para pagar por web

Si, se reserva por mail con antelación y se paga aparte, está al otro lado de los museos Baticanos, se entra por la izquierda (mirando de frente el Vaticano) junto a la garita de la guardia suiza

I travel with my license, passport and teacher ID. That day they only ask to see my confirmation email. As you probably know, often there are not hard rules, it depends on who is in charge. A passport always trumps a license except for renting a car I suppose. Wouldn't you have both with you anyway? Sorry I couldn't be of more help.