If you are talking about playing the TV Show game and not a Video or Computer Game a link to some sites that provides unofficial rules and explanations of the game have been added below the answer information under related links. If you want to know how to become a contestant on Wheel of Fortune and the rules for becoming a contestant a link to wheeloffortune.com has also been added.
When you won the car they did not add the extra $5,000. The show has been on for over 25 seasons and there was also a daytime show that was on for over 15 years so the prizes have changed a number of times over the years. The related link describes some of the changes over the years
Black Gown was the Wheel of Fortune bonus puzzleBlack Gown was the Wheel of Fortune bonus puzzle
Highly Organized was the Wheel of Fortune bonus puzzle.
Shrubbery was the Wheel of Fortune Bonus Puzzle for February 18 2013Shrubbery was the Wheel of Fortune Bonus Puzzle for February 18 2013Shrubbery was the Wheel of Fortune Bonus Puzzle for February 18 2013Shrubbery was the Wheel of Fortune Bonus Puzzle for February 18 2013Shrubbery was the Wheel of Fortune Bonus Puzzle for February 18 2013
Spunky Hero was the Wheel of Fortune Bonus Puzzle for January 31 2013Spunky Hero was the Wheel of Fortune Bonus Puzzle for January 31 2013Spunky Hero was the Wheel of Fortune Bonus Puzzle for January 31 2013
Trick Play was the Wheel of Fortune Bonus Puzzle for February 25 2013Trick Play was the Wheel of Fortune Bonus Puzzle for February 25 2013Trick Play was the Wheel of Fortune Bonus Puzzle for February 25 2013Trick Play was the Wheel of Fortune Bonus Puzzle for February 25 2013
No they do make the rules so they can break them, but you only get to be on Wheel of Fortune once. It is considered a game that includes fortune and luck and because spinning the wheel can end a turn it is not possible to have championship matches like on Jeopardy. It is not as important to have solved the puzzle first you have to solve it when it is your turn
Wheel of Fortune - 1983 Wheel of Fortune 25 12 - 25.117 was released on: USA: 19 February 2008
Wheel of Fortune - 1983 Wheel of Fortune from Portland 4 - 29.169 was released on: USA: 10 May 2012
Wheel of fortune does not provide contestant information
Go to the Wheel of Fortune site
Wheel of Fortune - 1983 Wheel of Fortune from Portland 1 29-166 was released on: USA: 7 May 2012
Wheel of Fortune - 1983 Wheel of Fortune 25 18 25-123 was released on: USA: 27 February 2008
Wheel of Fortune - 1983 Wheel of Fortune 25 15 25-120 was released on: USA: 22 February 2008
Wheel of Fortune - 1983 Wheel of Fortune from Portland 3 29-168 was released on: USA: 9 May 2012
Wheel of Fortune - 1983 Wheel of Fortune 25 13 25-118 was released on: USA: 20 February 2008
Wheel of Fortune - 1983 Wheel of Fortune 25 5 25-110 was released on: USA: 8 February 2008
Wheel of Fortune - 1983 Wheel of Fortune 25 1 25-106 was released on: USA: 4 February 2008