If I eat 5 eggs a day, have 3 tablespoons of peanut butter, and 36 ounces of white fat free milk a day combined with moderate weights and cardio each day, is this healthy?
Will eating lots of eggs and peanut butter, and drinking a lot of milk help you bulk up?
Yes, however I hope that you are not just eating these for your breakfast, lunch and dinner.
If you seriously want to gain muscle mass, then consider calculating your TDEE and add 200~500 calories(this is known caloric surplus). Next your protein intake should be 1g per lbs of bodyweight, where as your fat intake should be around 0.5 ~ 0.6g per lbs of bodyweight and the remaining can be used to fill up your carb intake, and your micronutrients(aka vitamins and minerals).
With that said, you may need to adjust your caloric intake accordingly since the calculation itself is a rough estimation.
Otherwise, I don't advocate tracking down everything you eat as your overall fitness and diet should not be tedious and boring and if you are not competing in any sort of sports / competition that requires you to make or lose weight.