please do not run with a parachute. it will absolutely destroy your sprint mechanics.
having said that, have you done any work on sprint mechanics? most young athletes have terrible mechanics, and most coaches (track coaches included) have no idea how to teach it. go hang out at
www.charliefrancis.com and see what you can find. In general, if you can fine tune your start and first 10 yards, it will make a huge difference. The details of the mechanics are too numerous to get into here.
As for training, at your age simply adding muscle mass in general will be of benefits. However, put a LOT of focus on the posterior chain, as it is where all your sprinting power comes from. Plenty of squats, deads, box squats, RDL's, glute-ham raises, etc. Also, depending on how much muscularity you have, incorporate plenty of dynamic effort days into your training, where you use weights in the 50-60% of 1RM range and focus on speed. If you are fairly skinny, then its too early to worry about dynamic effort. Just add muscle mass and you will get faster!
Another thing... I am a big fan of olympic movements, but the gyrations most people think pass as an olympic lift will get you nothing. If you can not deadlift with perfect form, there is no reason to be olympic lifting. If you do not have appreciable muscle mass, there is no reason to be olympic lifting. If you have good muscle mass and have VERY GOOD technique, then by all means include the olympic lifts.