These bills are not rare. In circulated condition they have no extra value. Even uncirculated, they retail for at most $1 more.
Face value only, unless it's crisp and unfolded.
Unless it is uncirculated, any $20 bill printed since the 1970s is worth only face value.
No such bill
Please post a new, separate question with the bill's denomination.More information may be available at the following questions:"What is the value of a 1963 US 1 dollar bill?""What is the value of a 1963 US 5 dollar bill with a green seal?""What is the value of a 1963 US 10 dollar bill?""What is the value of a 1963 US 20 dollar bill?"
Please post a new, separate question with the bill's country of origin. None of the major dollar-issuing countries (US, Canada, Australia, New Zealand) print bills with such a high value.
One dollar.
...Nothing. There is and was no US one million dollar bill in circulation. It is a privately made novelty item that isn't worth more than the money used to print it.
Please in a date.
US$1.25
The Bahamian Dollar is pegged 1:1 with the US Dollar, so a $1 Bahamas bill is worth exactly $1 US Dollar.
The only bill fitting that description is a silver certificate. Please see the question "What is the value of a 1923 US 1 dollar silver certificate?" for more information.
One US dollar.