Buckyboy

I am looking into buying a Grey for me and my family and before I do, I need to know some things. I hope you guys can help. 1. About how much time do i need to devote to my bird so its friendly? 2. Whats a good age to buy them at? 3. How much exercise do they need? (and best ways to go about it) 4. I heard they can be potty trained, But how do i do it? 5. I have 2 dogs so I have a room just for the parrot, So if I was gone, would it be fine for me to let if out of his cage (and will we chew stuff up? I know its a lot of stuff to answer but I do want to know this before buying. Thanks!