Yes, less than 6 are known.
Indian cents all have some premium above face value. The older large cents are even more valuable.
There are many years that have valuable 1 cent coins. For Lincoln cents, this usually will involve a combination of the year and the mintmark -- a small "D" or "S" below the date. You can find a list of retail values for all the different types of U.S. cents here : http://www.numismedia.com/fmv/fmvcents.shtml
It depends on the coin. For the decimal pennies (1971 and later) all the ones dated prior to 1992 are 97% copper while ones after 1992 are copper-plated steel. And all old pre-decimal pennies struck from 1860 to 1970 are made out of 95% copper.
Earlier years are more valuable than later coins. The more collectible wheat pennies are pre-WWII.
It would depend on how many pennies they had!
All pennies are worth a cent.
All wheat pennies, regardless of year are worth at least 3 cents if the date is readable. Some wheat pennies though, are worth quite a bit more. For instance, the 1909 S VDB penny is worth several hundred dollars even in worn condition and so is the 1914 D penny. However, a 1909 S VDB penny in pristine condition could be worth thousands of dollars. In general, the older the wheat penny the more valuable it is. For example, most wheat pennies dated in the 1940s-1950s aren't that valuable, but wheat pennies dated in the teens and twenties are worth a lot more.
Yes. The change was in 1958-1959.
Pennies from 1982 and before were all copper
Yes. In 1944 they were all wheat ear reverse pennies.
Honestly I do think pennies are necessary, because in this econmy times are hard , and pennies have value plus we need all the help we can get.
There are 100 pennies in a pound, so 100 pounds of pennies would equal 10,000 pennies. Since there are 100 pennies in a dollar, this would be equivalent to $100.