Secondary AdSense Queries

Want to understand some things about AdSense -

1. When you buy verified AdSense accounts, does that mean you can just put the code in your site and start getting clicks? This eliminates the waiting for AdSense approval process?
2. When a domain is already verified in that AdSense account, can we add another domain and just insert the same code and start getting clicks?
3. Suppose the purchased AdSense account is verified with an address, can you edit the address and put another address to verify OR will it detect the same address from another AdSense account?
4. The difference between Hosted and Non-Hosted AdSense accounts?

Thank you in adv.

1. Always buy adsense with approved domain name.
2. You have get approval for every domain you add in that account.
3. You can use different address
4. Mostly hosted accounts are those which work only with Youtube and Blogger blogs.