Hello Richie and welcome to the forum. I noticed that nobody has replied to your post so far, and I think it's for this reason: they don't want to be the bearer of bad news. Hard drives are not very tolerant of voltage spikes, power losses, or sudden physical shocks. Dropping a hard drive from even a few inches onto a hard surface can cause internal mechanical damage. That being said, let's try to make the best of the situation and see what can be done.
First, when you ran chkdsk, did you use any command line options, such as /f (to fix errors) or /r (to attempt to relocate data from damaged sectors to good ones), or did you just enter "chkdsk"? The correct syntax is "chkdsk C: /f /r" (Some people claim that /r implies /f, but I use both just in case they're wrong.)
Second, if you know who the drive's manufacturer is, you might try using their own diagnostic software to get a better idea of what is wrong. And don't automatically assume that it's a Toshiba drive just because it's a Toshiba laptop. You should open the bottom cover and verify what brand it is if you're not 100% sure. If you do find that it is made by Toshiba, try using the utility DOS Diagnostic Tool ver. 7.0, you will probably need to install it to a CD, DVD, or USB stick in order to boot it. Look for a "read me" text file for instructions when you unzip it. The link is here: http://storage.toshiba.com/storage-services-support/warranty-support/software-utilities#diagnostic
Maybe before you try any repair options you should recover your personal data from that drive, and in this case Recuva is of no use to you.
You need to boot that computer with a "Rescue CD" which has the ability to copy files from it to another drive. Not another partition in this case but a separate internal or external drive.
There are many rescue CD's out there, but a very user friendly one with the ability to boot a computer and transfer files is "Rescue Kit Express 11 Free Edition".