The package should detail all the elements that are part of the photographer's service. It should show a price, either including or excluding VAT. It should also spell out clearly how much of a deposit is required to secure the booking, and when the payment for the full package price is due. This varies from country to country. Here in Scotland, it is common to have all the fees paid approximately one month to 2 weeks before the wedding.
The photographer should also let you know what payment methods they accept, such as BACS (bank transfer), cheque, card payments and so on.