australia
No, they do not.
No
The US Olympic Committee pays athletes a cash reward for their success. Gold - $25,000 Silver - $15,000 Bronze - $10,000 There is a current controversy though about the IRS considering this to be a taxable income.
only on wedensdays
They are paid in the currency of the country they are playing in. Pay varies amongst different athletes.
An athletes pay can vary from function to function. The amount of their pay is determined by the contract that their manager helped to design.
no they do not have to pay taxes on their winnings.
Yes they have to pay taxes on the winnings
Everyone who earns income, from whatever source, is required to pay taxes on their net taxable income. There is no exception for professional athletes.
Nothing; most Olympic athletes make money from endorsement deals and other ways of trading on their fame such as book deals, television commentary, interviews, etc. Many, particularly in less popular sports have regular jobs, or are supported by their families.
no they do not