well, you'll need a rachet too. and a bit of luck. you have 2 oxygen sensors on the bottom of your exhaust manifolds (those tubes that go to your exhaust lines), im gonna spell things out since you don't know much (not being a jerk, everyone starts somewhere and questions are good to ask!). you'll have to cut to lines and reattach them according to the oxygen sensors you have. if you have the means i would also reccomend replacing the cataylitc converters (those football shaped things right after the exhaust manifold).
The IAC (or Idle Air Control) supplies the engine with fuel/air when in idle mode. It is on the top of the throttle body (the metal thing the black intake tube connects to). the ERG recycles exhaust back into the combustion cycle in an effort to help the environment which is gay. The TPS (Throttle Position Sensor) is on the side of the throttle body facing the firewall. The MAF (Mass airflow sensor) comes right after the air filter and requires a special hollow torx head to get it out (see tech articles). These are all usual suspects when **** starts acting up.
go to autozone to see what code your engine threw (they do it for free), and buy an owners manual (just buy it, trust me). look in the manual and it'll tell you why your engine threw the code.
another cause could be a vacuum leak. check all those plastic lines by your firewall for cracks.
My advice would be to replace the o2 sensors, change your plugs and wires, clean your MAF, run seafoam through your vacuum line (search posts for more info on this), change your oil for some fully synthetic, and enjoy how nice it runs.