Custom code to customize the category pages

Hello,
URL: http://yourtechadvisors.com
I have a couple things I would like to accomplish for this request.
1. I would like to cut the title out shown in the screenshot, the heading can stay, but the plane text needs to go.
Example Category: http://yourtechadvisors.com/blog-cat/apple-products/

2. I would like to add a message that shows when a category is empty.
Example Category: http://yourtechadvisors.com/blog-cat/cool-apps/

Support access has been enabled.
Thanks.