Help me get in shape? (:

I'm 19, 5'7", and I weigh about 125 lbs. I think my thing is that I have basically zero muscle.. I'm just really soft all over and I don't like it. I just have a layer of fat all over me. I just bought the TIU diet plan, and I was wondering if I followed that, do half an hour of stretching, an hour of walking and/or the elliptical, and going to the gym for strength and/or doing a TIU workout everyday, do you think I could get rid of my flab by January? Any tips? (:
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Just curious, but do you have any idea on how long it'll take me to see results? Or do you think I would see much of a change by January?
Help me get in shape? (:
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