No such weapon. You need to see a gunsmith.
yes.
No
It depends on several things. Is is new or used, what model is it, and what condition is it in?
100-400 or so
Have it examined by a gunsmith. It can be chambered for either 9mm Luger or .380 ACP
50-800 usd
S&W never made a 25 ACP handgun for retail sale.
100-600 USD depending on condition, box, accessories, papers, etc..
Request a manual from Browning.com
Smith & Wesson made several different pistols in .45 ACP, including an M1911 pattern pistol. You'd have to be more specific about which model you had in mind before this question could be answered, as the different models vary quite a bit.
value depends on overall condition. perhaps $350 - $500
50-1500 USD or so depending on specifics