Does any one know anything about coins?

I have 3 diffrent types that were given to me.
The first is one with a lady on it with a small crown that says liberty. There is small stars all around the coin. On the back there is an eagle and it says one dollar. Most are from the 1800's and one from 1900. (what is it and how much is it worth?)
Next is a coin with a man on it who is lacking hair. It says liberty one the top and they all date in the 70's. On the back of 2 of them there is an eagel with a moon behind it and on the 3rd is a liberty bell with a moon behind it. (what is it and what is it worth?)
Last but not least is a dollar coin that has a woman with a pointy crown it is from 1923 on the back is a picture of an eagle with its wings down sitting on a rock, it says peace at the bottom (what is it and what is it worth?)

* all of the coins I was given are in nice shap. I have no idea if that goes into consideration.

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I'm not sure if it really is Mexican dollars, but I have a coin that has the following things written on it:

First side:
Picture of an eagle that looks like it's feeding on a snake, with the words on top: Estados Unidas Mexicanos

Other side: Picture of a man with a long beard with 0 on his side.

So does anyone know?

Is these silver dollars still in circulation?

I have three silver dollars: all of them have President Eisenhower on the front. One of them has a picture of an eagle on the moon on the reverse side dated 1971, two have the picture of the liberty bell and the moon on the reverse side dated 1776-1976. Are these worth anything more than face value? If they are face value, can I just use them like I'd spend a dollar bill?

I also have four silver half-dollars dated 1971, 1972, 1972, and 1973. Same question for those.

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