How many skin laser treatments should I undergo for the persistent spots?

Hello? I work outdoors for a long time due to my job. So, even when I apply sunscreen, UV protection is not easy. Also, I have many moles on my face and arms, which is stressful. I heard that the appearance of moles in certain areas can sometimes indicate health issues, so I am worried. How much does skin laser treatment for mole removal typically cost? I heard that a single session may not be enough to remove deep moles.