You could change the profile to Phone Only, or set up your profile so that your email arrivals don't chime when they come in. That's how mine is set up, I get so many emails that it gets annoying to hear a sound every time something comes in. The indicator light is enough for me to see that there's a message for me to check later.
Yes, depending on how you personalize that profile. From your Home Screen, go to your Profiles and scroll down to Advanced. Highlight the profile wanted and choose edit from the menu.