Wow, that is an old skimmer that we no longer make. Right off the top, I can tell you that you are missing the air hose to connect it to the venturi so that the pump can pull in air and water.
You can purchase the air hose from here...
http://www.coralvue.com/air-line-tubing-5-16
With the air hose, you will probably also need a silencer. You can purchase that here...
http://www.coralvue.com/air-silencer
Let me know if you need anything else.