blackberry pearl questions?

i just got the blackberry pearl and i'm confused by it......i finally understand how to text and stuff but. i have 3 questions1)is there any way to get an inbox and an outbox instead of just "messages"?2)how do i get new ringtones (get it now)?3) what is the difference between a sms text message and a mms? thanksalso..how do you change the sound for the text noise? any answers at all would helpthanksssssone more..how do you get on the internet with it? i can't figure it out=(