How does a candidate raise campaign funds?

Some of the most common ways to raise money is to ask people, presidential canidates can get money from random people but the amount must be under $1000 dollars or it is illeagl and the candidate can be kicked out the election. Another way is to save up from there former high paying poltical jobs they had, or just from the jobs they used to have. Those are the two basic ways to get money if yopu are ever a presidential candidate.