How many eggs including yolk can I eat in a week forbodybuilding without increasing chorestrol levels and without damaging kidneys. My weight is 70 kg?

First check your cho. If you are concerned about cholesterol, get a blood test done to check your level. Eggs do raise the cholesterol if you eat them too liberally unless you eat Egg whites only(yellow part has all the cholesterol). Eating more than 2 eggs daily could raise your cholesterol. So I would advise you to stay in the range of 10-15 eggs per week if you exercise vigorously.
At least 3 a day. Quoting http://tinyurl.com/nhp5a6s "Eggs consistently raise HDL (the “good”) cholesterol. For 70% of people, there is no increase in Total or LDL cholesterol. There may be a mild increase in a benign subtype of LDL in some people." Cholesterol is not really the cause of heart disease- the real cause is inflammation. See http://tinyurl.com/9x3n594 But excess protein can cause kidney damage.