My grandfather wants me to move out when I turn 18 & I'm currently in my second year of high school, I know I have a little bit of time & I've already been looking at places, but what do you think would be a reasonable price for how much rent may cost? How much money should I start saving a month? I'm so clueless!

The problem is that rent varies with location and so does the customary contract. Some require first/last months rent plus a deposit. Living on your own can be very expensive. The best way is to look in the newspaper for rental ads. Those will help guide you as to what your going to need for your area.