If you got it in change, 5 cents. It's far too new and common to have any added value. You should be able to find them in change relatively easily.
Still only 5 cents.
All US nickels (except for silver war nickels) are 75% copper and 25% nickel, with a present melt value of 4.9 cents.
A fifty cent piece and a nickel. One is not a nickel, but the other one is.
There's never been a gold nickel. Your coin is either plated or was affected by exposure to heat or chemicals. Either way, it has no added value.
If you found it in change your nickel is only worth face value. US nickels made from 1866 to mid-1942 and from 1946 to the present are made of a copper-nickel alloy, not silver. In fact, no circulating US coins have contained any silver since 1969.
It's the usual practice of this site to answer a single question at a time. Please see:"What is the value of a 1940 US nickel?""What is the value of a 1942 US nickel?""What is the value of a 1944 US nickel?"
As of 16 Feb 2018, the melt value of one US nickel is 4.4 cents.
This design is called either a buffalo nickel or an Indian head nickel; both names are about equally common. Please see the question "What is the value of a 1919 US nickel?" for more information.
The US nickel was first issued in 1866. Please double-check your coin.
5 cents.
A 1957 nickel is worth face value only, unless it's uncirculated or a proof coin.
In average condition, both coins are only worth their face value.
Average current retail value is $5.00
Check that coin again. The first U.S. nickel was issued in 1866.
This famous design is also frequently called an Indian head nickel. Please see the question "What is the value of a 1920 US nickel?" for more information.
Liberty nickels were made from 1883 to 1912. Your coin is a familiar Jefferson nickel. Please see the question "What is the value of a 1939 US nickel?" for values.
It's not possible to give an answer without a date. Look for questions in the form "What is the value of a US nickel?" for specific information.