Here’s what consumers have asked with answers from La Roche-Posay staff and previous consumers.
Yes, you can read about testing on their site at https://www.laroche-posay.us/education-center/beclearbootcamp
Salicylic acid, benzoyl peroxide, and alcohol will all significantly reduce the amount of oil on your skin so you might feel dried out. I wouldn't worry about it too much unless you break out in a rash.
A good rule of thumb is 6-8 oz of cleanser or toner is about a months worth of product. You'll get about 30 days of use based on their product sizes.