How fast will your legs tone if you run everyday for an hour?

I'm 15 I'm pretty slim, my legs aren't huge or anything, but I have cellulite that I would like to get rid of and I've been told that running helps that. I just wanna know how long it would take for me to get rid of the cellulite, I'd be running around 6 AM since I have a job and have to be there early. I don't have like huge clumps, but like on the front of my legs, when I flex, I have it, and on the back of my thighs when I relax I have like little dips, I'm embarrassed just typing this. Can someone help?