ISO training evidence

Answer: There are no particular templates - you can show the auditor training certificates, or some other records showing that your employees have attended trainings.

Could you also please let me know a part from implementation question, are they going to interviewed individually?

Answer: I'm not sure if you refer here to employees in your company, but the certification auditor can speak to anyone in your company, and he can ask them any question to find out if they comply with the security rules.