Please can someone help me!!!! I am quite new to this and I am really stuck right now....I've tried to enhance my sidebar so that I can have more area to work with on my content page... but I dont wont to lose my sidebar!!!

I've been trying to add code, so that users can toggle my siderbar, or even have a sliding bar and so that i can extend my content are but not lose the overall side bar!!

everything ive tried wont work properly

and ive noticed each time i have used a css code from other sites.. they wont work unless i put #fw-sidebar, but the design come out all wrong

this is my website : MVS-Music Vision Sound .com

if anyone can help me achieve what i'm after, it will be highly appreciated!!!