What are the most famous folk, fantasy or fairy tale characters from
native children's literature in Indonesia, Nigeria, Egypt, Mexico and
Turkey?

i.e. Asking random people on the street in Nigeria, what Nigerian
fictional characters would be mentioned again and again?

I don't mean currently popular, like Harry Potter in the United States
or the hero of the current children's best seller in Turkey. By
famous, I mean characters that truly span generations, will be
recognized by 60 year olds and 20 year olds alike. Characters with
long lasting fame equivalent to fictional characters "The Scarecrow
from the Wizard of Oz", "Peter Pan", or "Superman" in the United
States.

You might want to consider reposting this as five separate questions.
When you bundle a group of questions together, as you have here, it's
a rather daunting prospect for Researchers. We must undertake five
research projects, knowing that if we fail to find adequate
information on any one of them, we will be unable to post an answer,
and will receive no compensation. If each of these questions were
posted separately, you would probably get faster, better results.

Thank you. Will do.