Yes, it's free.
Yes, the park is free as I recall.
Yes both the park and gaiser conservatory (the greenhouse) are free. Parking is also free.
Yes
Yes, free entry and free parking
Yes. There is a snack bar in the park where you can purchase food and drinks. It has seating under the trees and also has umbrellas.
Yes it is free
Yes, it's free to walk around the park grounds but if you want to get in the green house you have to pay.
Thanks! Your answer is awaiting moderation.