Hi Reenu! About the treadmill question -- go here (to the Exercise forum) http://www.3fatchicks.com/forum/exercise-34/
, click "New Thread" at the top left, and post your question there. I don't know anything about treadmills myself and so can't help you, but there's lots of people in the Exercise forum who can give you advice about treadmills. I'm afraid your question isn't going to get much notice here in the Introductions part of the Maintainers forum.
About the skin and surgery, there isn't any way for me to guess how much skin removal surgery would cost in Canada. Here's the web site for the Canadian Society of Plastic Surgeons: http://www.plasticsurgery.ca/
-- you might find some information there or contact them for further information.