How long will it take me to get toned i weigh 187 and im 5'11?

I only eat 3 small meals a day for example I have one egg and a glass of water for breakfast and mustard and a can of tuna for lunch then dinner is greenbeans a a small piece of chicken and what exersises should I be doing and how many reps and sets I only got one. 20 pound dumbell please help thx