What kind of information? Wikianswers may be able to help
Usually a coin has the country on it somewhere. You might not be able to read it, because unless it is from an English speaking country, the words on the coin are not in English. For example, Spanish coins say Espana on them, not Spain, because the word Spain is in English, and people in Spain call their country Espana. You can find all the information you need in a coin catalog. Good luck.
One can find information about coin machines on the 'Coinstar' website. Information about the different types of coin machines can also be found on Wikipedia.
There many places where one can find information on US coin values. One can find this information from online websites such as Coin Study. One may also be able to get an idea on US coin values by viewing US coins on eBay.
You can find information about the value and history of an old coin with a cross on it by consulting numismatic books, visiting coin dealers or collectors, or researching online on websites like Numista or the American Numismatic Association.
penny
You cannot since there is not enough information.
"Coin" in English is moneta in Italian.
Just looking at the coin carefully will help. The name of the country might not be in English. For example, a French coin will say Republique Francaise on it, and a Swiss coin will say Confederatio Helvetica. A good coin book will help find the answer.
There is a website called Heritage Auctions that could be a useful resource when trying to determine the value of a rare coin. There is a search box on the site where one can input the information from their coin and find out the value.
the English £1 coin
Search Google for the denomination, county of origin and the year of your coin and it should come up with information about the type and should give you the weight of the coin and the purity of silver.