And now for the questions:
1. Shortly before Jazz 2's release, the Jazz 2 team claimed that there would be 12 guns. Assuming they were not counting shields, what are two of the other three guns that are in the game but can not be fired? (Hint: They do not have their own event in JCS and do not come from enemies. You also do not see them in most levels and they are not used in any of the official levels.)
I don't think they ever were made. The blade gun was simply changed. And the fireball ammo only showed up in TSF.

2. What was the first game to be released using the Jazz 2 engine?
I'm not sure if it actually was Battery Check. It might also have been JJ2. But my best guess is on Battery Check

3. Which game, Jazz 1 or Jazz 2, uses more 3D effects with ambient lighting turned off?
Jazz1? The 3D bonus episodes were great

4. Which JCF user has the most warnings?
Probably Slayer

5. Early in Jazz 2's existance, Jazz2City was looking for photos of what Jazz 2 team member?
I think it's Jon Maclellan also known as Jeh or Evil_bill

6. Say that "John" was creating a Jazz 2 level. John had a set up somewhat like this, where each event took up three horizontal tiles:

No Event
No Event
No Event
No Event
No Event
One Way - Solid Block
One Way - Solid Block
No Event (1)
No Event (2)
V-Pole
No Event
No Event
No Event

"John" had a problem. When the rabbit came out of the one way solid block, Jazz would go really high above the ground and into a secret area it was not supposed to be able to get into. Which event could "John" place in the tile labled "No Event (2)" in order to make it so Jazz would not fly as high when he came out of the one ways?
I would probably just put a heavy wind up there or some ceiling springs?! I don't think this question is very clear

7. What bug related to ammo amount did the 1.23 patch fix in multiplayer but not in single player?
I have no clue, I suck, shoot me.

8. The "TSF Virus" was, in fact, not a virus. What was it actually classified as?
A lame hax0r

9. What are the servers with the name "Unknown" on the server list actually and why are they impossible to join?
I have no clue. I think it might be XJJ2 mistakes

10. A Jazz quiz on Jazz2City was created way back in 1998 and many people took it. Who got the highest score?
Dino