Turn the two red handled valves so the handles are vertical.
Take the lid off the pump strainer basket and check to see if there are any parts in there. Remove any parts or debris that is in the strainer basket, and fill with water manually. If the water all leaks out on the floor, there is a drain plug somewhere that needs to be installed on the pump. Replace the lid on the pump strainer basket.
Remove the jug from the skimmer(s). Check to see if the skimmers have plugs installed underneath the jug and remove the first plug you find. If there is more than one plug, get a picture so we can look at it. Install the skimmer basket.
Turn the multi-port valve, on top of the filter, to the filter position. Check to see if there is a gauge or sight glass that needs to be installed on the multi-port valve.
Locate the appropriate circuit breaker and power switch, there may not be a power switch, but there must be a circuit breaker. Don't turn anything on yet, just be sure you know where they are.
Try to find where the return goes into the pool and feel around inside the pool to see if the return is plugged (it should be). Remove the plug from the return line. There should be some kind of return fitting that gets screwed on where the plug used to be.
Then report back on your progress and we can try some further steps.