Yo no conozco la plaza de armas, estuve de paso entre pisac y cuzco fue de pasada que visité

La entrada para los peruanos es de 10 soles y para extranjeros 20 soles, mucho cuidado con llevar la DNI peruana y no ser blanco porwue no le creen nacional

I'm not sure how you would return, thought the sanctuary can likely arrange transportation to Pisac from there. Suggest you contact them, or contact driver in Cuzco.

Oh I am sorry that I missed the question. I am afraid I do not know.

collectivo from Pupito in Cusco. 3 soles each way. they will drop you right outside, just ask before getting on.

Claro que puedes llegar desde Pisaq, debes tomar los buses que parten desde Calca o Urubamba, de Pisaq al paradero de Cochahuasi te cobrará el bus unos S/2.50

They run completely on donation and as Kieth mentioned they do have a sight seeing bus of their own, I have a couple of e-mail addresses and phone numbers but can not post them here, if you would like them just message me.

I don't know the hours for the animal sanctuary, but it might help you to know there is another good site to visit that's extremely close (a little farther up the road from Cuzco). I don't know its name, but it's like a living museum of llamas, alpacas, vicunas, etc. and it has exhibits and demonstrations of wool processing and weaving, native food plant varieties, and more. It includes a very nice gift shop of well-made artisan items. So if you arrive too early for the animal sanctuary, you might go to this place first and the sanctuary second.

Yes, it's close to both Cusco and Pisac, an hour. The llama preserve is across the street. The Cch. Sanctuary has vicunas, alpacas and llamas but the condors highlight the visit, especially if you arrange a flying demonstration.