You may change your Package or its duration if the card has not yet been used in any venue and it's vialidity period has not started.

No, each attraction can only be visited once. You may only do so in special circumstances, such as if you are forced to leave the venue and return within 10-20 minutes. 

No, you can leave the bulding when you are finished ?

The card is valid for a specific numbers of hours, depending on the packages purchased. It is necessary to activate a package to get the discounts and services offered by Tourist Card Partners. 

A complete list of Partners and the exact discounts can be found on the Tourist Card website in the Partners tab.

Please, check which type of Tourist Card you purchased and whether the venue is part of your Package.