Where to edit content on Category page

I want to edit the text content on category page content

1) The text shown on the footer with the title “A world of inspiration for your home”
For each category page I want to display different text here so it is relevant to the category page

2) Above the product grid, there are sub-category links, I want to know where I can edit this or hide this.

3) Where can I edit the side bar, so that sub category options can be there instead and further filtering options such as attribute filter can be added / contact form etc.