Sharp Hiptop 3 / Sidekick 3

alright, just got my sidekick 3 i bought it off one of my friends, she had minutes on there when i bought it and im going to remain using her sim card (its a prepaid card) she deleted everything off before she gave me it, what i wanna know is, her email is still on mine and everything. can i send emails, send pictures, texts, everything, but is there a way she can view it cause its in her email and stuff?