Centimes Silver

I need help from coin collecters?
I have many coins and want to know if any are of value
Pope John Paul the 2nd 1979 gold coin
A queen elizabeth the 2nd 50 pence bronze coin from 1973 on the left it says D.G Reg. F.D
a gold coin from 1824 commemorating Benjamin Franklin for the promotion of mechanic arts
alot of 1 cent silver coins from 1962 that say 1 centime and i believe are italian
a bronze 2 pence queen Elizabeth the second coin from 2002. That says Reg. F.D
I can’t help you on the Franklin one–it’s not a coin as far as I can tell. It’s a token or medal of some sort.
The two pence and 50 pence coins are going to be worth just face value if they have any wear on the at all. In fact, the 50p coin has been resized since then, so that one you’d have to take to a bank to get it exchanged.
My first thought is that the 1 centime coin isn’t Italian, because they call their small coins a “centismo”. However, France did issue 1 centime coins that in 1962 looked like this: http://worldcoingallery.com/countries/coine.php?image=img7/69-928&desc=France%20km928%201%20Centime%20%281962-1997%29&query=France%20km%20928
Unfortunately, they’re pretty common coins–it’s the sort of thing you’d find in a coin dealer’s “two for a buck” box.
With the John Paul II coin, it would take more of a description to tell what you have. Describing all the writing on both sides would be a huge help.
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