Can these pills hurt me?

My dad just said "too many vitamins can kill you". I think that's a dumb statement. Anyways...I do take about 4 vitamins a day. I also take blood pressure meds and cholesterol meds. I also took some ibuprofen today for a headache and some nights I take over the counter sleep aid. Is this too much medicine for my kidneys? Could this harm me or kill me?