As for 8265 - The building instruction booklet includes motorization of the set. (However, it is not remote controlled. Just plain motor and manual gear selection)
Apart from the booklet, there is also instructions on the internet to make it remote controlled.

Somehow, I'd advice to start with motorization first before venturing into remote controlled for beginners. Good luck rongsheng.
I believe you can do it!

As for 8014 - This is a Star Wars Clone Walker. I think it is a bit small to motorized it. No place to hide the motors and battery pack.

Hi rongsheng,
Most technic set are included to add in the motor. If you want to make fully motorized, then you needs to get the Power Fuction stuffs. But hard to get it lah.
Nowday, the Power Function stuffs are more advanded, Like the IR remote control , Ir receiver & etc...