Tourist bureau = The office in a city or the department of a government that deals with tourism.
Declared the mayor = The "mayor" is a political position that every town and city in the UK has. It is non-governmental, but the mayor is in charge of leading political decisions in that city. "To declare" is to say or announce. So the mayor has made an announcement to the town.
Will the cook bring me the coke = a strange sentence. A cook = the chef, normally an employee in a househould. Coke = cocacola.
Any follow up questions?