Of the men running for president and vice-president, who's the richest? According to The New York Post, "Edwards' personal wealth is comparable to his November rival, Vice President Dick Cheney," which means he's very rich indeed. But the wealthiest is John Kerry—or, at least, he's got the wealthiest wife. All four major-party contenders are multimillionaires.
I'm not sure who the least wealthy candidate is, but I suspect it's the itinerant Michael Badnarik of the Libertarian Party.