When i turn the key to turn on car all i hear is clicking

Check your earth leads and voltage in battery if its below 13.2 then battery is at fault if battery and all leads are ok then your solenoid on your starter motor has gone try turning the key while someone taps the top of the starter motor with a copper hammer not to hard though

Your battery doesn't seem to have enough voltage to turn your engine over. get a jump and take it in to an autoparts store to have your battery and alternator checked out.