The starter and cillanoid are one. They are located directly under the radiator.
Check for loose or corroded battery cables Most likely starter solenoid is going bad
Drive it to an Auto Parts store and have them run a test of the charging system. Also make sure that the battery connections are clean and tight. If you see a bulge in one of the battery cables then it needs replacing. Make sure the ground connection at the neg battery cable is tight. A battery can be bad no matter how old or new it is, especially if it was discharged, even once. Have the battery load tested.
it could be a multitude of problems: ur battery could be to the point where it barely has enough power to turn over but the radio and lights are still powered, ur alternator coulda went out and its not powering ur battery enough to start it up but ur batter still has a small charge and runs the radio and lights and such, or most likely the cillanoid on the starter is bad and u need to replace it.....or u can jus go see a mechanic and pay the money to hav the problem fixed cuz wikianswers doesn't solve everything....but good luck