100-1000 depending on EXACTLY what you have.
100-500 or so
20-100 USD or so
Yes, S&W made hand guns chambered for this cartridge.
A Smith and Wesson M&P 40 is a .40 caliber hand gun.
Standard Catalog of Smith and Wesson, 3rd ed., by Supica and Nahas
The Smith and Wesson 915 is a semiautomatic 9mm hand gun. The 915 was discontinued in 1995 when the 910 was released.
No, that is a different company.
No
Size.
Best to take it to a gunsmith.
50-450 usd
50-200 usd