I need some help!

Hey everyone, I'm currently making a Forums page for my RSPS and I'm running into a little trouble with a couple of thing.

I need to figure out 3 things, maybe you can help me out

1. How to make the background not transparent in the section that posts are handled.

2. How to make usernames show up with their respective colors everywhere on the forums, not just on profiles.



3. How to add icons in front of usernames for groups.