Great questions babypooh!
Most daycares have a policy book. You can ask to view it or get a copy! It should have answers to all of the above questions.
I've never had to look for a daycare, but I found these useful questions:
Do you have a sick care option?
What is your policy regarding sick kids?
Do I have to pay for days when my child is absent due to illness or vacation?
What is your discipline policy?
What types of meals and snacks do you serve?
Do you charge extra if I'm late picking my child up?
What is your staff turnover rate?
What are your security/safety policies?
Can I observe/visit my child whenever I like?
Good luck!