What is the first number?

Who or what is known as 'the tijuana brass'? Based on the clue 'this is an extension of the initials us', what is the answer? What is referred to by 'tobago'? Which performer is associated with 'wings'? What is referred to by '2 4 10 16'? What is referred to by '273 celsius'? What is associated with: 27315 degrees c? What is associated with: 27316 degrees centigrade?