Welcome to the community!
If I am in one of the eight selected countries with a fido plan, when I make a call back to Canada, is it using the 1000 long distnce minutes?
No, the 1000 long distance minutes can only be used for making calls from Canada to any of the specified countries.
How much for one minutes?
If you use your phone internationally then you will be roaming and the Fido Roam will take effect providing the country you are in is part of the Fido Roam and you will be charged $12 a day for international countries and $8 a day for the US. You can find out more about Fido Roam here.