I would like to remove the breadcrumbs and page titles from all pages and posts but the CSS code I am using is not working. Please assist.

I am only having this problem with this theme, but it is my favorite so I’d like to get the problem solved. On any and all posts I add to the site, only the title and photo is saved and posts to the site. The content of the post is not. When I compose the text, save it, then preview it…it is not there. I can visit my site and indeed the post is there but not the content of the post. I go back to the post and click the edit button and the full text that I had entered and saved previously is still there. So technically it is saving it, but not publishing it. Or even letting me preview it. I spent a couple of hours with my hosting site customer service trying to figure it out when they finally opened my site with admin privileges and checked it out. They verified there was something wrong but identified it as a WP issue and advised me to this forum. It was soon after this that I went ahead and tried a couple of other themes. Although I did not care for them, they proved that the problem with saving post content was only with the “Express” theme. The other themes had worked perfectly.
Any fixes for this?
Edit: I see now that it is the short few lines of text that should be displayed on the post on the home page that is not showing up. If the “read more” button is clicked, the resulting post page is showing the full saved text of the post.