It was made in 1946
What you describe does not exist.
You will have to contact Browning for a correct answer.
The browning B-2000 shotgun was made by FN of belguim,and assembled in Portugal.these shotguns were made from the years 1974-1983.these shotguns range in price from 275-400 dollars.
Yes
100-1000 USD
Browning will send you a manual for free if you contact them
100-1000 depending on specifics
100-500 dollars
No
What is the question? Yes, Browning made a 3 shot Auto 5 in the 1930's and in the American made Auto 5's in the 1940s.
The serial number would be needed to give the exact year. 3 Shot Auto 5's were made between 1934 and 1940 for Belgian Made guns. American Browning Auto 5 3-shot models were made from 1940-1948
Anywhere from a few hundred to tens of thousands of USD depending on EXACTLY what you have.