I don't know much about Toshiba laptops but you should have the ability to connect to your router wirelessly if the ethernet connection isn't working.
Try getting the 'Connect to' in the start menu first, click here. Check the wi-fi switch is on. This could be a physical switch on the side or top of the laptop or having to press the FN key and another key. Have a look at the top row keys icon on the keyboard if you can't see a physical switch.
Once you get the wi-fi switch on then use the 'Connect to' link in the start menu and follow the instructions. This is assuming you've enabled wireless with your router.