Preheat oven to 375. Arrange bread slices on large baking sheet. Brush bread with 2 teaspoons oil. Bake until bread is toasted and golden brown, about 10 minutes. Rub toasts with garlic.
Mix tomatoes, basil, 2 teaspoons olive oil and sugar in a small bowl. Season to taste with salt and pepper. Spoon 2 tablespoons tomato topping on each toast. Arrange on platter and serve.