How do you move out of your parent's house when you're 14?

I'm 17. going to be 18 soon. I want to leave home because my mom is EVIL. I am not kidding. don't think "oh shes just a teenager they're all like that at that age, she'll get over it", I've been hating my mom since I was 11. she told be stuff like she'd rather be dead then be my mom. she is a dream killer, I told her I wanted to be an hairdresser when I was 16 and then told her I wanted to open my own business and she told me that I would never be able to, that i'm not good enough in math, that I would just lose money, and blah blah blah. Now, i'm not really sure what I want to do, but she wants me to be a stewardess, which I really don't wanna do! but she still insist and say that I'm gonna srew up my life. after that I told her I was thinking about opening my own clothing store, she told me I had no future in business and that would just be a waste of time, and When I went and applied at stitches and ardene ( to see if I was actually gonna like it) she told be I was too fat and ugly to work at those kind of store (I am a size 9 and I am SUPPER pretty) she even would get mad at my sister because she wouldnt say Hi when she comes from school, and take away her ipod and phone, and even if i'm almost 18 she controls the people I talk to! for example, if she finds out I'm talking to a certain person she would cut the internet and take away my phone and any form of comunication I have, crazy huh? She did a LOT more, but i'd be too long. We've tried to talk to her about it but all she says is "oh boo hoo you poor little kids!! you are so unfortunate!" I am not too worried about me cuz I can move out of here anytime I want since I am older then 16 and I live in Canada, but my sister is only 13, going on 14 in january 1010. She tried to kill herself a couple of time because of my mom, she is seeing a therapist and all but my mom still says it's MY fault my sister is so messed up. My mom does know she tried to kill herself and still blames me for it. My sister really wants to get a job and move oout with me, unfortunatly I think under 16 they are only aloud to move out of the house if the parents agreed. I am positivly sure my mom is not gonna approve. I am really worried about my sister and I want to know if there's any way possible to get my sister out of this house of torture before it's too late? ( sorry for my english, I'm french haha)