How often should I receive Pico Toning treatments?

My freckles and blemishes have become noticeably darker, and my overall skin tone seems dull, so I am planning to get Pico Toning treatment.

Since this is my first time getting a laser procedure, I am writing this post to find out what I need to know and prepare beforehand, rather than visiting completely clueless.
My first question is about the recommended treatment frequency for Pico Toning. I have heard that it is a gentle laser, so I would like to know how often I should receive treatments to achieve the best results without putting strain on my skin.
I am also curious if the cycle varies depending on an individual's skin condition.
Also, what are the essential things I need to check and ask the clinic or the director before receiving Pico Toning?
Are there different types of equipment for Pico Toning? I'm also curious which device is more effective!
Also, I am curious about how many Pico Toning sessions are required and how long the effects last! If I diligently apply sunscreen and take good care of my skin after the procedure, can the results last longer?
This is my absolute first time getting Pico Toning, so I have so many questions.
I look forward to your detailed reply.