Cook spaghetti to desired doneness as directed on package.
Meanwhile, heat oil in large nonstick saucepan or Dutch oven over medium-high heat until hot. Add onion; cook 3 to 5 minutes or until tender, stirring frequently.
Stir in ground turkey; cook and stir until no longer pink. Add all remaining ingredients except kidney beans. Bring to a boil. Reduce heat; simmer 10 minutes. Add kidney beans; simmer until thoroughly heated.
Drain spaghetti. To serve, spoon spaghetti into 4 individual soup bowls. Ladle turkey mixture over spaghetti.