2. (Part II) Was Tessio the young guy who invited Vito to go to the theater with him to see his girlfriend/actress, and later told Don Fenucci to "sit down" inside the theater?

-No that was Genco, whose father owned the grocery store young Vito worked in, and eventually became Vito's consigleri



4. (Part II) Was this young Clemenza the same "fat" Clemenza of the 1940's, who later "dies of a heart attack?"

Yes

5. (Part II) Was Tessio the other guy at the Corleone dinner table with Vito and Clemenza the day Vito offered to take $50 from each of them and settle with Don Fenucci?

Yes



7. (Part II) Immediately after the murder, Vito returns to the stoop in front of his apartment and sits down with his wife and children. Santino appears to be about 6, and a "chubby" Fredo (obviously healed up from his bout with pneumonia) about 12 months older than baby Michael who Vito holds. Have I properly identified the children?

Yes