Losing weight

Eat whatever you want, just stay at your calorie deficit. There's really no magic formula or no "bad" foods, it's all a matter of how much you consume versus how much you burn off with exercise and daily living. If you've put your stats into MFP, follow your daily calorie regimen. Also, don't expect a lot of weight loss fast, and do expect for it to slow down at times...this is normal. Approximately 0.5 - 1 pounds of weight loss per week is pretty reasonable, unless you have a lot to lose. So keep eating the pizza, don't deprive yourself, just fit it into your calorie goal for the day. Don't starve yourself either, that solves nothing.

Yes it does matter what you eat. Save pizza for a treat meal. Eat lots of Veges with proteins and a little fat. Work out what your calories for a day are and stay in that frame. If you add exercise, then eat half of the calories burnt, that way you stay full and still have a calorie deficit which means you lose weight.

That's definitely doable, say it's 8lbs you want to lose so that works out at a lb a week. Just put the weight of 132lb in as the target weight and that should give you calories. You will do it easy.