Audio driver

I need help! I had to re-install windows xp onto my laptop but it wiped absolutely everything that was on it off and now when I try to listen to music or watch videos online it says I have no audio drivers installed, how can I sort this out? I have tried to look everywhere on the laptop to find a way of fixing it but there is no way. I was wondering if there was any way I could download any drivers free, and where from? I do not know much about my laptop as it was given to me by an ex-boyfriend and I have none of the original software that came with it... it appears to be a Toshiba Equium and I think from 2003.. would be grateful if anyone could help me! ? I also cant seem to get wireless internet as I also need the drivers for that...