*************Omg! Plzz Help! *****************How can you lose 2 kg a week? xxx?

Im 62 kg at the moment and im 16 & a girl. I know it would be unrealistic if i wanted to lose more than that a week but for starters 2kg is good. any advice an how i could lose that weight per week. Websites? Diets? Food ideas? Is a Side stepper & a treadmill useful in this case? And if so in what ways can i use them? What methods are best APPROPRIATE? im really focussing on my stomach and thighs. & i am'nt overweight, but i'd love to lose the weight and have a toned up body. ! hope my information is useful and thanks in advance! xxx