ok, engine makes weird sound and trans. sounds weird in 1st/2nd gear high rpms

Okay everyone...i got my car(97 honda civ dx) bout a year ago. About 3 mos ago the engine and trans. i guess have started to make weird sounds. The tranny pings sorta when i press the gas, and it seems worse in colder weather, like tonight it was horrible. Every time i leave off the gas its fine, then press the gas it pings. Also, the engine...around 15 mph in 1st gear and like 30mph in second gear, right around before the time i shift, the engine sounds like a weedwacker, heh. Its horrible, and just started to do this. And it sounds like an unwinding sound when i push in my clutch it makes the unwinding sound and dies down. HELP PLEASE...the biggest thing is that this car is up for sale in teh paper now, and it needs help and i dont wanna spend $ to fix it cuz im sellin it in order to get a prelude. HELP PLEASE