Short answers, pulled from the story.
Pyotr Ilyich Tchaikovsky was born on the 7th of May 1840 in Votkinsk within the Vyatka Governorate of the Russian Empire. His father served as a lieutenant colonel managing ironworks near the Kama River.
Pyotr Ilyich Tchaikovsky entered the Imperial School of Jurisprudence at age ten and graduated on the 10th of June 1859 as a titular counselor. He later enrolled in the Saint Petersburg Conservatory when it opened in 1862 to study harmony counterpoint and instrumentation.
The union between Pyotr Ilyich Tchaikovsky and Antonina Miliukova lasted only two and a half months due to emotional distress writer's block and psychological mismatches. The relationship was doomed from the start by these factors leading him to leave shortly after the wedding.
Pyotr Ilyich Tchaikovsky received formal Western training at the Saint Petersburg Conservatory while The Five rejected traditional practices for folk music elements like whole tone scales. Despite ideological differences he remained friendly with most members including Mily Balakirev Modest Mussorgsky Nikolai Rimsky-Korsakov Alexander Borodin and César Cui.
Nadezhda von Meck provided financial support for thirteen years allowing Pyotr Ilyich Tchaikovsky to compose without teaching duties. They agreed never to meet under any circumstances despite calling each other best friends and she derived her income from her late husband who was a railway magnate.
Pyotr Ilyich Tchaikovsky died on the 6th of November 1893 aged fifty-three after conducting the premiere of his Sixth Symphony Pathétique nine days prior. Cholera caused by drinking unboiled water at a local restaurant remains the official cause according to biographers though academic speculation suggests intentional suicide or contracted cholera deliberately.