advice needed on sunfire

i recently bought a 2001 sunfire with 74000 miles on it. the front end makes noise going over bumps and stuff...which i have narrowed down to strut mounts? because it drives perfectly straight and has no vibrations. my question is...is this something that needs fixed right away to prevent any damage to front end parts or is it ok for now as long as i can bear the noise.

also what oil do you guys put on your cars...2.2L? i was thinking at maxlife maybe? which is what i had them put in it when i got the oil changed yesterday.

also when i got the oil changed they tested the antifreeze....it came back bad and they recommended it to be replaced....i know its dexcool and is good for usually 5 yrs or 100,000 mi. so its probably needs changed. ive read a little bit on what needs to be done to flush and refill......where are the bleeder valves at? i am going to do this myself. how many gallons does this car take?

and ive noticed every once in a while while sitting at a light i can feel the idle change slightly... i was thinking about putting some STP fuel system cleaner in it. anyone use stp products? (this is an automatic car unfortunatly :grinyes:)

thanks for any advice.