Is it possible to add a Section, Entries in basic/simple HTML page instead of Twig template? In Craft CMS is it possible to add a Secion, Entries in basic/simple HTML page instead of Twig template?
You can't add a Section in Twig either. You have to use PHP in order to create logic. Html is only used to display things on you page but it does not include logic nor is it able to fetch elements (working with databases) Twig is a template engine, you could describe it as a middleman between HTML and PHP it is able to fetch elements and uses a limited amount of PHP to display them 

You won't be able to work with Craft properly without using Twig at all unless you modify many things with PHP

Like mentioned in the other thread Craft might not be the correct  CMS for you