Hey hi
As all the blood cells are less, this indicates pancytopenia. Which need proper history and examination to find the cause. And as MCV and MCH are raised that means there is macrocytic anemia. Which further has may causes like
B12 def, Folic acid def. As there is severe anemia , blood transfusion is indicated. Taking supplements to increase Hb will take months to build Hb. It is also important to increase platelets to avoid bleeding tendency. It is advised to see a specialist (Hematologist) to find the underlying cause. Which might need bone marrow examination etc. And looking at the age of the patient please consider consulting at earliest. And for mild prostatomegaly though it is common in old age, consider consulting urologist for management.
Hope this helps...
Next Steps
Consult- MD-GENERAL MEDICINE OR HEMATOLOGIST AND GENERAL SURGEON OR UROLOGIST