Tools

This post will help you get all the tools that you'll need for your phone. All links are direct links

I'll mention the tools categorised by their purpose.

For unlocking bootloader and rooting:
Minimal ADB with fastboot support
ADB drivers
Superuser zip
JDK 8 Update 45 32bit
JDK 8 Update 45 64bit

For all-in-one Android One Toolkit that includes:
One click Unlock and Relock Bootloader
One click Root Locked and Unlocked Bootloader
One click Flash recoveries
Install single or bulk apks
Android One Toolkit v1.2
Android One Toolkit v1.2 Patch(necessary to install)
.NET 4.0