Will they call if he is unsettled?
Will they allow him his comfort toy/dummy/blanket whenever he wants it?
Will he be looked after by the same couple of people all the time? If not, what are the hours of his main carers?
Will they allow you to take him for short visits before starting? (staying with him)
Do they inform you of his eating/sleeping/toileting at the end of the day?
What is their policy for giving panadol for a temperature?
What is their discipline policy?
Do they welcome you as a visitor to the classroom unannounced?
Do they have a food/drink policy?
How do they assist with settling at sleep time?
How do they go about providing age-appropriate resources in a mixed age group?
What happens if he is away sick or you go on holidays? Do they do make-up days or discount fees?
They should have some kind of policy book describing lots of different areas. You could ask to see it. Good luck, hope it goes smoothly for you!