Edit forum category name

[WDS]

Hello, my name waddys, I am Spanish and not English, so I use an online translator, please excuse my bad English

I know how to make small changes to my forum and let the pictures down here and my doubts.

1?:

how I can change the size of the icon, not only the size of the image if not block, the default is in 48x48 px, I wish you 24x24px, that part I can edit these parameters?

2?:

I also want to increase the size of this text is the name of one of my forums within the category this play center.

3?:

change the text size

4?:

and if possible, centered vertically the information that is within the red box.

Many thanks.
Hope you can help me, thanks.
a n00b at this but eager to learn.

Waddys M.