Cents have been made for well over 200 years so there are many collectibles to choose from.
In general most cents up to the late 1930s are worth more as collectibles. The values depend a lot on their dates, conditions, and mint marks so it's not possible to give a full listing. Plus, there are many sites such as http://www.numismedia.com/fmv/fmv.shtml that provide price lists that are kept up to date regularly.
As a short summary:
Among Lincoln cents, some (but not all) dates to look for are
1909-S
1909-S with the designer's initials VDB
1914-D
1922 with a filled mint mark
1955 double die
Among Indian cents:
1908-S
1909-S
1877
1864 with the designer's initial L
Yes. US war nickels (with a large mint mark above Monticello) are 35% silver and are worth at least $1 each, more in better condition. Canadian war nickels are made of base metals but are prized for their special "victory" designs and unusual coloring due to the change in metal content.
Yes. All US nickels have a nominal weight of 5 grams.
None, since there is no such thing as a nickil. However, there are 20 nickels in a US dollar.
That's an extremely broad question because nickels have been minted since 1866 at 3 different mints. Please see the Related Links for value guides. Also remember that except for the famous "war nickels" of 1942-45, US nickels have never been made out of silver so they're the only nickels that have any extra melt value. All other nickels are made of a copper-nickel alloy so any extra value they might have would be purely as collectible items.
No, the only US nickels to have silver are the "War Nickels" from 1942 to 1945
How much are 63 nickels worth?63 nickels are worth US$3.15.
A standard US roll of nickels contains 40 coins.
None of the new US nickels are silver.
The first US nickels (5¢) were minted in 1866. The first Canadian nickels were made in 1922.
No, they don't. US nickels are made of copper and nickel. The only ones that DO contain silver are war nickels, minted 1942-1945.
1964 US nickels were minted at Philadelphia (no mint mark at that time) and Denver ("D")
Composition of US Nickels is 75% Copper and 25% Nickel