This is a Generac genset.
You have an extra number in the serial number, but I won't need the correction.
The engine is a Generac 990 CC, GT990.
The lights are all on at the control board because you do not have your exercise timer set.
To set the exercise timer, set the switch to AUTO.
Press and hold the SET EXERCISE button until the genset starts (may take 10 seconds or so).
Once the engine starts, you must let it run until it shuts itself down (about 12 minutes). If you shut it off before it completes it's cycle, the timer will not set.
The timer will be set for whatever day and time you do this.
For example, if you set the timer at noon on a Friday, the unit will exercise at noon on Fridays.
If you set it at 10 PM on a Wednesday, the timer will be set for 10 PM on Wednesdays.
If the starter is not cranking the engine, the first thing you need to do is to check your battery cables to make sure the connections are clean and tight.
If the cables are not the problem, your battery is likely too weak to crank the unit. You would need to take the battery in and have it tested.
Do not rely on a voltmeter to test a battery, as even a bad battery can read fully charged with 12V, but not have enough ampacity to do any work.