1/ I don't really know but I'm going to say it won't make much of a difference. It's basically about calories in and calories out. Having too much red meat isn't great but if you stuck to lean meats, like skinless chicken and even kangaroo, then it's all good.
2/Personally I like to have a good breakfast and a typical breakfast for me at the moment is half a cup of mixed berries, skim milk, 3/4 cup museli and some yoghurt. The yoghurt gives me energy and the wholegrains in the museli keeps me full for hours. If your metabolism is firing then you should be hungry when you first wake up and want to eat. You should eat 4-6 small meals a day.
3/There's a time and place for everything but your comment of intensely reducing them is a good one. Things with white flour are highly processed and it takes no time at all for your body to digest them and soon you are hungry again. Most 'white' things have a whole grain alternative, brown rice, wholegrain bread, wholegrain pasta and these are the things you should be going for as they will make you feel full for longer and you won't want to snack on crap.