You probablly need a new battery, and for the running like crap part. Go to the passanger side foot well. Lift up the carpet (just under the glove box sorta), there will be a gold coloured cover, unbolt that, prolly 4 10mm nuts, then there will be a box which is your computer to run your car, which will most likely have a light flashing. This flashing light tells the driver or mechanic what is wrong with the car, in a way. So count the number of times it flashes then let us know, and one of us will look the code up for you and help you. Hope this helps bro.