My car was running fine all day yesterday until that night. I cut it off and it wouldnt start back up. Finally i got someone to give me a jump off and it worked but the dash lights kept on dimming in and...
You, my friend have a flat battery.
However, replacing the battery will not fix the problem, the battery is just a symptom, just like having cough syrup won't fix a cold, it will ojnly make your throat feel better.
What you need to do, is replace the battery, then get a multimeter, and check the voltage of the battery when the car is running at idle (in park/neutral), it should be 13.2-14.4v. If below this, im suspecting 12.0v or below, then you will have to have your charging system (alternator) checked.