Hey! I'm glad you enjoyed!
1. On page 11: "Whenever there is a change in your base values, the current values also change."
On page 12: "You gain 5 Vitality and 2 Energy with each Level up."
So basically you recover 5 Vitality points and 2 Energy point by leveling up.
2. I didn't understand exactly your second doubt, but I think maybe it was answered in 1 no?
When you level up during an adventure, you recover those points, and those values are added to your base values, so when you start a new adventure (second booklet to be released), you'll start the adventure fully recovered with those extra points.
Thank you for playing!