The Three Towers of Trivia, October 5

My friends Kevin Render, Ivory Johnson, and I started a trivia group on Facebook a year ago (July 1, 2009 to be exact). We called it The Three Towers of Trivia, and we've asked our followers nearly 900 trivia questions as of today. Today is the start of our 3rd season, and I've decided to post my round's questions here, just to get my blog followers to come join our group. Check out this week's questions, and see if you can match wits with our current players!

1. A polyglot is one who excels at what?

2. Top sellers of Mary Kay in the USA are awarded a pink Cadillac. In the UK, top sellers earn what brand of car founded in 1881, making it the oldest automobile brand still in existence?

3. What cop show's producers changed the show's name to McGarrett in 1980, a change they deemed necessary for the show to be successful in the syndication market?

4. In September 2010, Roger Craig, a graduate student from the University of Delaware, broke what television record that stood for more than 6 years?

5. A recent study for the Gallup Healthways Well Being Index shows that, although leveling off at $75,000, increases in salary negate what often stated belief?

ANSWERS:
1. Foreign Languages
2. Mercedes Benz
3. Hawaii Five O
4. Largest One Day Winnings on Jeopardy!
5. Money Can't Buy Happiness