Nissan Micra K13 engine does not start

Hello, My car was three weeks unused at the parking lot. When I wanted to start it, it was very cumbersome and made extremely loud and squeaky noises. I then immediately turned it off to avoid consequential damage. In the second attempt to start it, he gave no sound any more. I then had it to be towed from the ADAC to the workshop. Today the battery was changed, because it was due and it still does not start. He gurgled, but no more. Clüssel was also seen whether the WFS is active. Error memory only showed ABS errors and was then deleted. Spark plugs were allegedly also controlled, which I don’t believe. Tomorrow the master will look at it again. Has jmd. perhaps an idea that could still be looked at, or had jmd. already the same problem. Thank you for your support.