This situation tells me that you reformatted your hard drive before re-installing Windows 7, and in that case, yes, all your drivers will be gone. What you need to do from here is go on Toshiba's website, download the appropriate drivers and put them on a thumb drive and install them on your laptop. From there, everything will be fine.
In most cases, Windows Updates keeps a majority of drivers in their library, so in some instances, all you would need to do is get your laptop a working connection and open up Windows Update and let it find what needs to be downloaded.
Jonas "Jackal" Lear
Serving the South Bay Since 1999