"abundance, a large quantity," 1866, American English (Tennessee), perhaps from the caboodle in kit and caboodle.
name of a club founded by Whig politicians in London (Addison and Steele were members), 1703; so called from Christopher ("Kit") Catling, or a name similar to it, a tavernkeeper or pastry cook in London, in whose property the club first met. Hence "a size of portrait less than half length in which a hand may be shown" (1754), supposedly is because the dining room in which portraits of club members hung was too low for half-length portraits.
1530s, "one who builds," agent noun in Latin form from erect (v.). In reference to muscles from 1831. The children's building kit Erector (commonly known as an Erector set) was sold from 1913.