Unless stated as included at the time of booking, a damage deposit or card pre-authorisation will be required at your accommodation agency on arrival.
If you are due to be arriving in to resort late, this will need to be provided the following morning after arrival.
The damage deposit amount can really vary for resorts and different accommodation agencies and can range from 150€ total to 150€ per person.
The other cost not included is tax. This can vary again depending on the accommodation booked and can be between 1€ for budget accommodation - 3.5€ for a 5* accommodation per night per person.
For example, a group of 4 may be required to pay between 28€ - 98€ tax in total for 7 nights accommodation.