Pull the slide to the rear, and look into the chamber. Some Beretta handguns also have a chamber indicator at the top of the slide, which is simply a piece of metal which protrudes from the top when a round is in the chamber. However, this is no substitute for a visual inspection when clearing the weapon.
Contact Beretta
You will have to call Beretta to find out.
Without a detailed description of the handgun, nothing.
It depends on which gun.
A good handgun.
$350
You will have to call Beretta. No way to id a weapon from just the maker and sn as a rule.
You will need to call Beretta. No published data that includes that number.
AFAIK, Beretta has never made a handgun in that caliber.
75-250 USD
Beretta model 92. It is a 9mm cal.
There's the Beretta Cougar, which is a semi automatic handgun...