You can, go on: www.crunchyroll.com
You can find it at Naruto Shippuden.com
Naruto shippuden all episodes can be found on narutoget.com
YES
Narutoget.com it has Naruto episodes too
He does find out and it is some where between naruto shippuden 230 or naruto shippuden 258. I'm sorry, but I can't remember for sure except it is between those episodes. lol there are only 177 episodes of naruto shippuden LOL
Youtube
yes you can find them at narutoship.com
At Game Stop
In naruto shippuden 163 naruto arrives at leaf village to find it destroyed. He begins to fight pain and the episode ends with naruto throwing rasenshuriken at pain.
he finds out about his dad in naruto shippuden when he fights pain i think
I watch my Naruto Shippuden on crunchyroll.com, which is free. I also have the Crunchyroll iPhone app, in which you can watch Naruto on the go