1- There are two downloads. Download both files. Install first file then apply patch. Ensure the pre-install of Dontnet Framework 4.0.
2- If drivers not detected, search this post or forum or search google for google android drivers for windows and install directly.
3- After you flash the recovery, this toolkit will reboot your phone in normal mode, but before reboot goes into normal mode, press key combination to prevent this to go in normal boot and go into recovery mode without detaching the USB cable from your computer. It will go now into TWRP or CWM recovery mode. If you don't boot into recovery then stock rom will overwrite your newly installed TWRP/CWM recovery.
4- If you dont swipe in TWRP / CWM recovery mode the bootloader will not be ovewritten and you will again in Android death screen.
Hope this helps you.