BR-Real cost of having a low credit score

Over one's lifetime, how much more interest will a person with low credit score ends up paying than a person with the highest credit score?

For mortgages (=house loans)

For car loans

What is the minimum credit score one needs to qualify for a mortgage?

Does a person who just meets the required score for mortgage approval have a good credit score ? (yes or no)

Which adjective describes that score?