Short answers, pulled from the story.
Vyacheslav Mikhailovich Skryabin was born in the village of Kukarka, Yaransk Uyezd, Vyatka Governorate. He grew up as the son of a merchant and spent his teenage years described as shy and quiet.
Vyacheslav Molotov succeeded Alexey Rykov as Chairman of the Council of People's Commissars on the 19th of December 1930. In that post he oversaw implementation of the First Five-Year Plan for rapid industrialization.
During Great Purge he approved 372 documented execution lists more than any other Soviet official including Stalin. When Stalin received note denouncing deputy chairman of Gosplan G.I.Lomov he passed it to Molotov who wrote on it For immediate arrest of that bastard Lomov.
In May 1939 Maxim Litvinov People's Commissar for Foreign Affairs was dismissed and Molotov appointed to succeed him. Relations between Molotov and Litvinov had been bad with Maurice Hindus stating in 1954 that Molotov always detested Litvinov purely of personal nature.
Molotov position became increasingly tenuous February 1956 when Khrushchev launched unexpected denunciation Stalin 20th Congress Communist Party. June 1956 Molotov removed Foreign Minister; the 29th of June 1957 expelled Presidium Politburo failed attempt remove Khrushchev First Secretary.