Sky appears blue in color due to the water moleules in atmosphere scatter blue color rather than red. Visible light rays are red, orange, yellow, green, blue. Among these colors, blue scatters more as it possess shortest wavelength with small waves.
No, the stars arent white in color, they appear to be white in colors due to the fall of light rays of sun on them. Since, it is night, due to the absence of glowness in the sky they appear to be shining.
According to science, Adam was the first person born on earth. But as per hindu mythlogy, Manu, Sun of Surya Bhagwan was the first man to be on earth.