How to lose a lot of weight?

Okay so basically I want to lose about 10 kgs, maybe more. I am 170cm tall, and I have no idea how much I weigh.. I have a kinda phobia. But, I'm guessing I'd be mid to late 60's. I'd like to get down to 53 kgs. For the past couple of days, I haven't been eating a alot. Today, I ate 1 and a half pieces of toast, with vegemite on it. That's it. But, I still have to have dinner. So I've pretty much been skipping lunch and breakfast, and eating dinner, so my family don't get annoyed. I also doing rowing & fitness training 4 days a week.I was just wondering, is this helping at all? I don't want to be stick thin, with all my ribs poking out, I think it looks disgusting. I want to look a bit like this : a href="http://www.google.com.au/imgres?imgurl=http://www.skinnyvscurvy.com/wp-content/uploads/2009/10/Bar-Refaeli-Is-in-a-Bikini-Once-Again.jpg&imgrefurl=http://www.skinnyvscurvy.com/bar-refaeli/bar-refaeli-bikini.html&usg=___m1U2Z_-89mUEXt038XzKzTF_IY=&h=678&w=500&sz=61&hl=en&start=0&sig2=ZJmFPyrSO-yPx_upNlCIVA&zoom=1&tbnid=A0Q7y47AsIcHyM:&tbnh=156&tbnw=120&ei=cpu-TLbJIYewcbPf6LEN&prev=/images%3Fq%3Dbar%2Brefaeli%2Bbikini%2Bunphotoshopped%26um%3D1%26hl%3Den%26safe%3Doff%26client%3Dsafari%26rls%3Den%26biw%3D1280%26bih%3D644%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=961&vpy=277&dur=4262&hovh=262&hovw=193&tx=127&ty=211&oei=cpu-TLbJIYewcbPf6LEN&esq=1&page=1&ndsp=23&ved=1t:429,r:21,s:0" rel="nofollow"http://www.google.com.au/imgres?imgurl=h…/a