These questions have garnered no interest, so I will answer them here:
1.) What was the first U.S. airline to power a flight with biofuel?
Continental
2.) What was the first U.S. airline to offer full in-flight broadband Internet service?
American
3.) What was the first airline to board more than 100 million passengers in a year?
Delta
5.) This airline became the first regional airline to inaugurate jet aircraft service in the U.S. 1965
Mohawk - BAC-111
8.) What was the first U.S. airline to sell tickets on the Internet?
Alaska