I'm learning to kitesurf on a 8m Naish Toro.
I think you're a little confused. I'm guessing you have a -North- Toro 8m.
Weight: 45-47kgs, Height: appx 160cm
My wife is about your size and has the exact same kite as you, I only mention this because I'm real familliar with some of the challenges people your size face.
First off, because of your weight, you're gonna have a hard time kiting in winds over 20 knots. There aren't a lot of options for kites smaller than 8m, and many are real "squirrely" when it starts blowing. On the other hand, when the wind is 10 knots or less, you'll leave heavyweights like me in your dust...
Second, although the Toro 8m was a great kite when it came out in 2002, it has pretty heavy bar pressure for a kite that size. My wife hates hers, but it gets her out when the wind is over 15 mph. Less than that, she flies her favorite kite, a Rhino II 12m.
What you need to find are small kites that fly well at the bottom of their wind range. Rhino II's are good, I know several lightweights that fly Fuels and like them.
Another option is the Peter Lynn Bomba, a -super- stable kite and very light bar pressure compared to most LEI's... perfect lightweight beginner's kite.
Hope this helps,