Please post a new question with the bill's denomination.
There was only one series of 1974 $20 bills so none of them would have a series letter. You may be looking at the Federal Reserve District letter instead. Please see the question "What is the value of a 1974 US 20 dollar bill?" for more information.
The Santa bill just has sticker of Santa covering the portrait printed on the bill. Being a series 1974, if it's in good condition, it could go for $25 or so.
US 1974 $100 bills were only issued in one series so there were none printed with a letter after the date. Perhaps you're looking at the Federal Reserve District letter or a plate-position indicator. There's more information at the question "What is the value of a 1974 US 100 dollar bill?"
Face value only.
What is the value of $100. 00 bill 1934 series # J01186491 A
The lack of a letter after the series date simply means it is the first issue of that series. Traditionally the series date is changed when a "major change" is instituted in the bill. Since 1974 a change in the Secretary of the Treasury is considered a "major change" to the bill design. A "minor change," including the changing of the Treasurer, is signified by a letter after the series date. The letters go in alphabetic order beginning with A. See the Related Link "Wikipedia: Series (United States currency)" for more information on currency series dates. See the Related Question "What is the value of a Series 1957 silver certificate" for the value of the bill.
2 dollars
A 1974 one-dollar bill does not feature Jimmy Carter; it typically features George Washington. If you're referring to a bill from the 1976 series that commemorates the American Bicentennial, it still features Washington and is not particularly rare, usually valued at its face value unless in uncirculated condition. If you have a specific collectible or error bill, a more precise valuation may require additional details.
Still one dollar....sorry : (
Sorry, there is no such bill.
Face value to $70 depending on condition
It is worth face value unless it is uncirculated.