In order to add brochure block to your course, put Edit mode on and open the block drawer from the grey arrow in the upper right corner of the course page.
Click Add block (1.) and then select Brochure (2.) from the list.
Add information about your course into Brochure block by clicking the gear icon on the top right corner of the brochure, choose Configure Brochure block.
Fill in all necessary information and then click Save changes. Click the tiny question mark next to each section in the form to know more about that item.
A finished Brochure looks like this.