A new museum of Leo Tolstoy is being created in Kazan, dedicated to the author’s adolescence and youth. Despite the fact that the basic facts of the Tolstoy’s life in Kazan have been restored by biographers, the inner life of the young Tolstoy and the features of his psychology are difficult to reconstruct due to the almost complete lack of sources. Since Tolstoy’s work is autobiographical, and he especially often relied on his own psychological experience in the draft versions of his works, the paper makes an attempt to reconstruct some features of the personality psychology of the young Tolstoy on the basis of the first complete draft edition of the novel War and Peace. The heroes of the novel, especially at the beginning, are at the age of youth, and Tolstoy, showing mental processes, recalls his youth. We can claim that Tolstoy, in his youth and adolescence, experienced the joy of life, suffered from ambition and awkwardness, found salvation in philosophical hobbies and daydreaming, in acting out certain situations, etc.