Call Child Protective Services
That's oddly specific, I'd probably crash at a friends place or (since I'm under 18) go to my local council who have a duty to take care of minors. (I don't know if I was supposed to respond seriously but I was doing research on this in the past just in case so ╮(￣▽￣)╭)
police stations exist
Well I ran away from home with 100 bucks, borrowed as much money as I could from my relatives and crashed at my friend's place for 5 months. During the time, I worked full-time to save enough money to rent an apartment. And now I'm doing good.
What would you do if your mother had thrown you out of the house and only having 12 dollars and 6 piece of clothes and a knife?