You do not have to anything to be a candidate- just announce that you are a candidate. Most, if not all, states allow write-in votes, so you can write your own name in and not only be a candidate but even get some votes from your relatives and friends .
To get on the ballot you have to file a proper petition with some large number of signatures of registered voters in the state and submit it by the announced deadline. You have to file a separate petition in each state and be sure to follow all their laws governing such petitions. To this requires a national party organization to help you.
candidate with most votes, president runner up candidate, vice president
Most candidates never become president.
lots of money
In 1825 the candidate with the greatest number of electoral votes would become president and the candidate with the next - highest number would become vice president.
2009
To become a write in candidate for public office a Declaration-of-Write-in-Candidacy must be filed. The declaration must be filed with the Secretary of State of a judge that is local.
no=so far dere hasn't been any elections n tat da candidate hasn't become president=
yes
yes
electoral college vote
The Electoral College
Yes, he can if he meets the requirements to be President. A congressman does not have to resign to run for another office/