Toshiba's Support Site
The great thing about computer companies is that, on a general level, they provide you with pretty much everything you're going to need to fix your computer software problems for free, and this includes drivers. With companies like Dell, Microsoft, and Toshiba, drivers can be found right on their official websites, so (unless you've got a weird third party peripheral) you won't need to get stuck in any shady corners of the internet where viruses can be picked up.
If you're doing this driver download from scratch, and you've arrived at Toshiba's website, in the upper right corner (see screenshot) you should see the "Get Support" button above the search bar.
Remember when we had you identify you computer make and model? This is where that comes especially in handy. You should see a "Download" button on the top bar, and you'll want to click it which will expand a little section below it. Click the "Laptops" category and then navigate your way to your specific model number of laptop. If you aren't sure, check with your manufacturer or look on the box it came in if you still have it.
After you've located your specific model, click "Go."