Customizing Category page

Hello,

I apologize if these questions have been asked already, I was unable to find answers.  I had the following questions about customizing the Category page (see attached image for reference).

1. Is there a way to remove the Category description?  In the attached image this is "Administration and managment"
2. How can I display the subsections?  In the attached image, you will see the "Using Nastel Navigator" section is empty.
3. How can I display the articles as a bulleted list with less space between articles?  So for example, under "Frequently Asked Questions," how can I have bullet displayed next to each article and how can I make the spacing between each article less?

Thank you in advance for any help offered : )

-Victoria