Follow the instructions in the owner's manual
Call a locksmith...
You will have to contact Beretta to find out.
To answer the question you will have to define what "break down into" means. Just for normal cleaning? If so, the owner's manual will tell you. Taken apart as far as possible? You would need a gunsmith to do it to find out.
Fine firearm.
Find a good gun smith.
break it
Best left to a gunsmith.
Best left to a gunsmith
Follow the instructions in the owner's manual
You have to hit it with a slede hammer until it breaks down then you've done it
200 or so
Beretta has made many different types of 22LR firearms. You will have to be a little more specific.