I obama should be disqualified what then? Would Biden be made president?
I don’t know but all I heard during the election was, the people vote for the president not the vice president.
No. The electors whould have to choose from those remaining cansidates FOR PRESIDENT, inother words, McCain and the 3rd party candidates. The vote for Prez and the vote for VP are separate votes in the Electoral College. So it could end up McCain/Biden or maybe Nader/Biden. Or because most electors are not free to vote for anyone other than the one they are pledged to, it might be thrown into the House of Representatives, due to the EC being unable to find a majority, with Obama's electors diaqualified.
Before the Electors vote - The Electors would vote for any person who is Constitutionally eligible to be President. It is not necessary for such a person to have been a Presidential or VP candidate.
After the Electors vote - Assuming the Obama Electors vote as expected, Vice President-elect Biden would become Vice President and Acting President at noon on January 20 pursuant to Section 3 of the 20th Amendment. Obama would trapped as President-elect, never to become President.