Note these things before posting:
1: if you took the latest OTA then you CANNOT root or unlock bootloader
2: if you got bricked at update latest OTA , then simply you can't unbrick at situation
3: their is such NO solution for battery problems of KitKat (only greenify works)
4: if you have bootloader unlocked and want to go back then Check pinned post.
5: Before Posting, always check forum because a lot peoples already asked questions about kitkat
6: You CANNOT install custom recovery if you don't have BL already unlocked.