A 1957 nickel is worth face value only, unless it's uncirculated or a proof coin.
The coin is just a common nickel, spend it.
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?"
Unless it's uncirculated, face value only.
It is necessary to know the amount of wear and mint mark (if it has one) to be able to make an estimate of value. I would suggest you take your coin to a reliable dealer and have it appraised.
$100,000,000,000 because such a coin doesn't exist. Silver was only used in US nickels from 1942-1945 on coins with a large mintmark over the Monticello. A 1957 nickel is a common coin, worth a dollar or so if completely uncirculated but only really 5 cents if circulated.
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.
In average condition either coin is worth face value only. If it's an uncirculated or a proof coin in its original packaging, it might be worth 50 cents or so.