Some bridal shop will provide (mine had some for rental and some for free) but if u want more special, then may have to buy. I didn't make/ buy any cos I worried I will end up buying lots of photo just for the sake of the props.
Where will your lunch be held? If is at hotel n hotel is near the church, I supposed is possible. Tea ceremony (if u want it) can be either after or during lunch. I saw before someone doing it but she do away w the tea ceremony.