I've had a Vixia. It would help to define what sounds you're talking about. Are you talking about the fuzzy noise through the video? That's simply ambient sound. You'll need an external mic with sound suppression to get rid of that. You could find one cheap on BH Photo Video or Adorama. Both are near you so shipping should be plenty quick.
You have to understand that what you hear yourself and what the camera's microphone records/picks up are not one in the same.