Hi! I'm glad you joined us. This board has been a HUGE factor in the success I've had, so gatoramanda definitely steered you in the right direction by suggesting that you come here!
I wanted to reply to you particularly because your stats are similar to mine. I started at 275, a little less than you, but our heights are the same and I was 34 when I started losing weight back in July of 2006. My goal was 165, which I met in October. I just want you to know that if I did it, you can do it. I never thought I would actually go through with it and lose over 100 pounds, but it IS possible!
As for the treadmill, that made me a little dizzy at first too, but now I can run on the thing without feeling woozy. Just take it slow and work up to higher speeds later on. Can you walk outside at all?
What kind of eating plan are you doing? There's lots of advice all over 3FC for people who are just starting out. I learned sooooo much from the people here. Stick with 3FC and you'll get tons of inspiration and support.