If you turn the coin over you'll find that it's a HALF dollar. Dollar coins carried a portrait of President Eisenhower from 1971 to 1978. In addition, all circulation halves from that year (in fact, from 1971 to today) are made of copper-nickel, not silver.
There's more information at the Related Question.
1$
If it's one you got in change or a bank roll and is copper-colored on the edge, there is absolutely no silver in it.
One dollar.
Either not Kennedy or not a dollar. Please look at the denomination on the back.
50 cents.
Look at the coin again the date is 1776-1976 and has no silver in it and is still only a dollar.
$1.75 for the set.
It's worth one dollar.
It only has silver if it's a '76-S half, in which case it contains 40% silver.
The 1976 silver dollar is only 40% silver. These sell for $4-5 dollars in internet auctions.
That's a bicentennial dollar, and it's still worth one dollar.
The 1776-1976 dollar was an Eisenhower dollar and the silver version has a current value from $14 to $325 depending upon the condition of the coin.
I suspect you've made an error in the question.A 1976 Eisenhower dollar is worth approximately $1.00.A 1976 Kennedy half-dollar is worth approximately $0.50.