No answer in 24 Hrs? .... You're going to need to learn a heap of patience if you are contemplating a claim that involves mental health issues, reams of paperwork, reports & probably an expert witness/s
How long does a Plaintiff have to be able to bring a civil law suit against an individual from the time of the incident in NSW ?
The answer is it depends.... You have mentioned both damge to property & a claim for mental health issues... potentially both different claims with different limitation periods. It depends also on what year it occurred, the size of the claim, & your age.
If you want specific answers you must provide specific information... If you don't want to do that on a public forum then you need to go see a lawyer