fitness ppl, help please 10 pts?

[ktgurlll]

I want to get toned legs and I'm having a really hard time.
I've tried exercising but I build muscle really fast so after I ran for three days my legs bulked up. Ugh.
There's nothing wrong with muscular legs, except I'm a slim person and a girl and I think it looks weird on me.
What exercises do you suggest for me? Ones that'll get my legs toned (like the VS models) but not bulky and muscular

 

[OR]

working out takes a lot of time its not some magical thing that takes 2 days. You could do squats "without weights" and you could walk up or run up stairs.