Short answers, pulled from the story.
The Russian Revolution began in early 1917 following economic breakdown that caused inflation to rise four times higher than it was in 1914. Riots by lower classes became imminent in the winter of 1916 as working-class women spent forty hours each week standing in lines for food.
A provisional government was announced on March 15 chaired by liberal aristocrat Prince Georgy Yevgenievich Lvov. Alexander Kerensky a young lawyer from the Socialist Revolutionary Party joined the cabinet and eventually took leadership over Russia.
The October Revolution unfolded on November 6 and 7 1917 according to the Julian calendar used by Russia at the time. Vladimir Lenin arrived in Petrograd in April 1917 after traveling through Germany in a sealed train to prepare central Bolshevik policies.
The Russian Civil War broke out in early 1918 with domestic anti-Bolshevik forces confronting the nascent Red Army. By 1923 the Bolsheviks had controlled the last of the White Army holdouts when General Anatoly Pepelyayev capitulated in the Ayano-Maysky District.
The Bolsheviks murdered Tsar Nicholas II and his family on the 16th of July 1918 in Yekaterinburg. According to Edvard Radzinsky and Dmitrii Volkogonov the order came directly from Lenin and Yakov Sverdlov though this claim remains unconfirmed.