Cinco Pesos

Can I use old pesos (say 1970 and above) in Cancun?
I have a whole stash of them given to me from my uncle. Some say un cinco…is this one peso? This might seem like a dumb question…but i was so surprised how MUCH the peso changes shape and its design that I really didn’t know? I assume we use it the same as US money…If I have a shiny 1960′s penny i can use it still. I have some that say $1000, $500, and cinco peso…so any help is great!
I am trying to educate myself about the peso…and I have about 50 coins so…just wondering if they are still the face value as the new pesos and aren’t “antique”.
So anything with the $ sign on the front might be still currency there? Like above 1985? Geez….what do they do…get new pesos each year? Just by looking at these coins its so confusing how many times they are changed.
I can’t contact a mexican bank, I live in the US…and it cost a bunch to dial out.
All Mexican money older than ’93 is worthless…whole system was devalued and new money issued the…old stuff has no value. See site below for explanation and photos of coins that ARE usable.
prestame 5 pesos.flv