1. Meals - some eat the three standard ones, some of us eat only two or three, some change it up depending on how we feel. Nobody advocates snacking or "many meals" though.
2. Carbs - it is really dependent on the individual. Try low carb for a while and see how that goes, then try higher carb etc. 150 g carbs really isn't a ton - you'd still be able to "burn through it" and then get to the fat, assuming you are insulin sensitive, exercising a lot, and not eating a massive amount of calories overall. Again though it depends on the individual. I recommend giving low-carb a good solid one month trial though if you are trying to lose weight.