Short answers, pulled from the story.
Keith Moon died on the 7th of September 1978 from an overdose of clomethiazole, a sedative prescribed to help him manage alcohol withdrawal symptoms. Police found 32 pills in his system; six had been digested and 26 had not. He was thirty-two years old.
Keith Moon auditioned for the Who in April 1964 as a replacement for drummer Doug Sandom. According to Moon's own account, he had several drinks for courage, then got behind the existing drummer's kit at a show, played one song called 'Road Runner', broke the bass drum pedal and two drum skins, and was subsequently invited by Roger Daltrey to a gig the following Monday.
Keith Moon was known for emphasising tom-toms, cymbal crashes, and drum fills in unconventional places. Bassist John Entwistle described him as playing 'zig-zag' across his kit rather than in the conventional sweep. Moon was also one of the early pioneers of double bass drumming in rock, alongside Ginger Baker. Biographer Tony Fletcher considered Who's Next to contain the best drumming of Moon's career.
On the 23rd of August 1967, Moon celebrated his 21st birthday at a Holiday Inn in Flint, Michigan, while the Who were touring as support for Herman's Hermits. The night ended in a large-scale melee involving food fights, fire extinguishers, guests thrown into the swimming pool, and a piano reportedly destroyed. Police arrived with guns drawn. The hotel presented a bill for $24,000, reportedly settled by the Herman's Hermits tour manager Edd McCann.
Keith Moon was posthumously inducted into the Modern Drummer Hall of Fame in 1982, becoming the second rock drummer chosen. He was inducted into the Rock and Roll Hall of Fame in 1990 as a member of the Who. A 2011 Rolling Stone readers' poll voted him the second-greatest drummer in history, and a 2016 ranking by the same magazine placed him second in their list of the 100 Greatest Drummers of All Time.
Keith Moon's early style was shaped by jazz, American surf music, and rhythm and blues. His favourite musician was jazz drummer Gene Krupa, whose flamboyant style Moon consciously imitated. He also admired DJ Fontana (Elvis Presley's original drummer), Tony Meehan of The Shadows, and Viv Prince of the Pretty Things. He took early lessons from Carlo Little, drummer for Screaming Lord Sutch, at ten shillings per lesson.