There are no general 'tickets' for the park itself as entry is free. Tickets for specific attractions like Ecomare can be purchased on site.
As Royal Texel Park is a national park with free public access, there is no central ticket office or requirement to purchase an entrance ticket to roam its natural areas. You can simply enter the park and begin your exploration.
If your visit includes specific paid attractions within the park's boundaries, such as the Ecomare center or renting bikes from a local vendor, tickets or services for these can typically be purchased directly at their respective locations. Parking meters are also usually available on site at designated parking areas.