Adjusting template

I just started an LJ account and I have a somewhat concrete idea of how I want my layout to look like. I want it to be simple and easily customizable, so I chose the Quite Lickable layout. I have some questions though:
 
1. Is there any way I can adjust the width of the content area?   On certain computers, the background hardly shows up.
2. Can I use a different background pattern for the sidebar similar to this one: layout-lady.livejournal.com?
3. Can I change the size and color of the titles to my posts?
 
My LJ is just a work-in-progress, it looks like this right now: guinevere79.livejournal.com. It’s just a plus account. I may be willing to convert to paid account if the questions I have above may be addressed if I get a paid account.