paypal sandbox to original paypal

[eluser]T I[/eluser]
Hi

I used paypal sandbox to test my code and my ipn is working. but

Now i need to go to original paypal account. My confusion is in sandbox we make buyers and sellers account. and we get tit_789456613_biz@yahoo.com like seller account. is it needed in original account?

if needed how to make it?

if not needed which email address shd i use(is that client email address with which she enters her paypal account?)?

pls help

[eluser]Unknown[/eluser]
Sorry, this might be an unrelated question; I have a site www.kayakayak.co.uk, which is operating in the UK, selling kayaks. I want to use the same paypal account world wide, it is a basic paypal account, can I use it on other sites?