How to unbrick my Samsung Galaxy Y
Point 1: The error u have shown regarding cant mount **** has nothing to do with your phone bricking. Its just compilation errors in building CWM recovery (i blv this is the one u hv used)

Point 2: Unbricking by use of Odin is by far the easiest way to get ur phone back and working. This link will help you if u follow it properly link

Point 3: Regarding your driver issue I have a solution which will definitely solve ur problem (as it worked with me thrice..!)


Install Samsung USB drivers software which u will find in the above link.
Put ur phone in Download mode
Connect it to the PC
After it fails to recognize the drivers, go to device manager and check for "Unknown" device
Select options Manual Installation > Select from list
Select Samsung ADB driver
Proceed to Odin flashing...!