Put this in your theme style.css file or in theme Custom CSS Code textarea. Save it delete all caches and press Ctrl+F5 on website front-end:

#post-29 #wpforo #wpforo-wrap #wpforo-menu,
#post-29 #wpforo #wpforo-wrap .wpforo-subtop,
#post-29 #wpforo #wpforo-wrap .wpf-head-bar,
#post-29 #wpforo #wpforo-wrap #wpforo-footer,
#post-29 #wpforo #wpforo-wrap .wpf-sb-bottom{
display:none!important;
}

The red marked 29 is the certain page id. If you'll add wpForo shortcode in other pages you should add the same code with new page id.

Also please put this CSS code to fix the Russian translation issues on blue panel (phrases don't fit set  widths):

#wpforo #wpforo-wrap .wpfl-1 .head-stat-posts {width: 12%;}
#wpforo #wpforo-wrap .wpfl-1 .head-stat-views {width: 12%;}
#wpforo #wpforo-wrap .wpfl-1 .head-title { width: 70%;}

Thank you very much for your previous help. I have a new issue of <title></title> In the settings of the forum I have is here:

And is deduced I have here is so:

As I understand it loads the title from the settings wordpressa How to fix whatever the forum had title to only that which is specified in the settings of forum?

All is correct. The  forum home title consists of Forum Name - Website Name. There is no way to change it.

When you enter in a forum you'll see Forum Title - Forum name -Website Name

When you enter in a topic you'll see Topic Title - Forum Name - Website Name