volvo does not start

Hi. Today I had the problem that my car did not want to start. Time was at 0 o’clock when I had tried to start it had constantly ticked and the light up in the ceiling went on and off. As long as I had stopped turning the key. After starting aid it went again. What could this be about? Is the battery maybe still ok and the spark plugs could be broken or something else? In July it came in as used. Was measured and was considered fully zugeo Is not normal the howling sound when the battery is empty and nothing is happening?