How to set default content when i create a node/container?

Hi Everyone

I'm a total newbie to Drupal and would like some help.
I am trying to create a structure such as follows..
Continents-->Countries-->Cities

Now i have created a container called continents..
and then created child containers called Asia Africa Europe etc..
now in each child container i have again created Countries such as italy, germany etc..

now when i create a child container, can i automatically assign it some text by default?

Also if have another issue.
Assuming each country has some common information sections... say population, history, advice etc...
the information varies from country to country.. but the section names for each country are the same..
how can i make it such a way that every time i create a country.. all the sections are automatically present ...

and when i just want to add a section to all the countries.. i just go a certain (container or category or node ???) and just edit there..

I hope i am clear.. Please help me out.. Am really stuck with this problem and would be grateful for any advice...

Thanks
Jimmy Page