How much are these coins worth?

Those coins don't sound like they are worth very much. The older the better the chance the coin will be worth more but if the coin have any rare mis-strikes or abnormalities they would be worth more too. It's difficult to know without seeing the coins how much they are worth. You can do one of two things: Go to a coin collector and ask them what they think the coins are worth or go to your local library or book store and find an international price guide for your coins and look them up.