Add photos and thumbnail to article

I was looking on the forum how to do it but not found answer. How can I upload photos to the article and create a thumbnail? I note that I don't need a special module to the articles.

You do need a special module for it as default Articles module doesn't support these things. I would recommend Ultimate Articles module. It's not expensive and do a lot of things http://www.boonex.com/m/Ultimate_Articles