Need help with my golf!?

hi i was wondering about my body in golf. i am 15, currently weigh 7 stone and am quite skinny with hardly any muscle or fat due to my metabolism. im using a very old club. the club i use is a 420cc mitsushiba jr tour oversize 3 wood and the max ive ever hit with this is probably 130 yards. is this good. and also if i bought a ping g10 or g15 driver would this make alot of difference to my distance?