Uh,
(1) the Roman Empire ended in the year 476.
(2) How could it be a Roman coin if it says United States of America?
Now that we're out of the realm of alternate history, please see the Related Question.
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?"
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.
The US did not make a gold dollar in 1894. They stopped production of the gold $1 coin in 1889.
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.
Heinrich Nickel was born on 1894-12-05.
These were not made in that year.
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.