Short answers, pulled from the story.
Nikita Sergeyevich Khrushchev was born on the 15th of April 1894 in Kalinovka, a small village in western Russia. His parents were poor peasants who struggled to make ends meet while moving frequently between rural areas and industrial towns like Yuzovka.
Stalin died three days after suffering a massive stroke on the 1st of March 1953, triggering a power struggle that allowed Khrushchev to become First Secretary by September 1953. He consolidated control by allying with Malenkov to arrest Lavrentiy Beria during a Presidium meeting on the 26th of June 1953 and later becoming Premier in March 1958.
Khrushchev was ousted on the 14th of October 1964 following years of discontent caused by agricultural disasters including the Virgin Lands Campaign and corn crusade failures. Food prices rose significantly in June 1962 causing public unrest and the Novocherkassk strike where 22 people were killed according to official accounts.
The 20th Party Congress opened on the 14th of February 1956 and Khrushchev delivered the Secret Speech to closed sessions on the 25th of February 1956. Over four hours he demolished Stalin's reputation completely while copies circulated widely throughout the USSR despite being marked not for press.
In June 1937 the Politburo set a quota of 35,000 enemies to be arrested in Moscow province with 5,000 executions required. Two weeks after receiving the order Khrushchev reported arresting 41,305 individuals of whom 8,500 deserved execution.