I ve few liver cysts, can cysts be reversed [without surgery] with diet and or any life style changes,? so my liver goes back to be totally normal?

NO. The liver cysts are benign and diet and life style change can not resolve it.
Liver cysts. occur in approximately 5% of the population. However, only about 5% of these patients ever develop symptoms. Simple liver cysts are always benign. Treatment is not required unless the cyst(s) cause symptoms. There is no known medical treatment to reverse liver cysts. Surgery to remove a liver cyst can usually be done laproscopically. Most patients fully recover within 2 weeks after surgery.