Value is hard to determine with out details of the gun. Maker, caliber, flint or percussion, style, condition all impact the value of the piece. I could help if you furnish me with those details or you can search the on-line auctions, such as Gun Broker and Auction Arms or even proxibid, enter your details in the search and see what is selling and for how much. You can also search the archives and or sold items to get an idea of what your gun is selling for. Another place to look is The blue book of modern black powder values, available from midway USA and blue book publications as well as many of the other hunting and firearm stores. Also available to NRA members on - line for free on there web page. That will give you an idea of the general value. Guns tend to have some regional value too, say a Thompson Center Seneca may be worth a bit more in the north east than in the mid west, and a Ruger old army may sell higher in the northwest than the east coast. Don't forget condition has allot to do with value, and with black powder the bore is king. You may have a gun worth for example $500, but the same gun with a bad or rusted bore may only be worth $150 so compare apples to apples.
Call Colt and they will tell you. Proofhouse.com has Colt sn data.
Depends on the caliber. A .45 caliber pistol uses about 40 grains of black powder. Contact the maker's website and download the owner's manual for YOUR gun.
1200
50-150
I have provided a link that explains how to claen it in detail.
$100
No published sn data.
No published sn data.
10-100 usd
depending on overall condition $150 - $200
Depending on the manufacturer, either Size 10 or 11.
Connecticut Valley Arms(CVA) is a modern manufacture that makes replica BP guns and guns of its own design. Model 1851 refers to a Colt pistol made in 1850's. A Colt gun would not be marked "CVA".