1-Yes. KH-7 started with a General Electric developed Orbital Control Vehicle (or OCV), but still used the Agena as an upper stage to put it in orbit. During the first few missions (four, I believe) there was some concern about the ability of the OCV to perform the mission, so the Agena was left attached for the operational stage, then detached, and OCV did all the attitude control. This was a bad omen for General Electric, because it demonstrated that the Agena was capable. However, the real issue was whether the Agena could provide the pointing accuracy required. Lockheed demonstrated that it could, and during the upgrade to the KH-8, the OCV was eliminated and the Agena provided not only boost into orbit, but also on-orbit attitude and control as well as support (power, telemetry, etc.). Over the years, the KH-8's lifetime was increased, primarily through modifications of the Agena. Agena was vital for the KH-8 mission.
2-MOL was not a manned KH-9. They had different contractors and different designs:
KH-7/8
camera: Kodak
spacecraft: General Electric/Lockheed; Lockheed
KH-9 camera: Perkin-Elmer
spacecraft: Lockheed
KH-10 camera: Perkin-Elmer
spacecraft: Douglas
The image you have is an early concept. The vehicle changed over time, particularly after 1964.
