Some questions about right way to get the Root for lg g pad 10.1 v700 ? & twrp & etc

hi
How to The right way to get the Root for lg g pad 10.1 v700 ?
How to reset the counter ? Maintaining the guarantee ؟
How to Recovery of the original system and Recover After install cyanogenmod and TWRP ؟

I'm sorry, I'm new in dealing with pad :( please help