Clear the snow from peoples drive ways, in summer go door to door washing windows, do a cake sale, even if you manage to save a fiver a week by skipping a snack or something at school, you'd have enough for a G&G ak in 6.5 months
You couldn't really get a job at the moment. I'm trying myself, being 16 I really need one to fund my (airsoft) habit. All the Christmas positions are probably taken already and everything.