Does the Sun also rotate like the Earth?
Well, yes and no. It rotates, but not like the Earth does. The Earth has a solid surface and rotates on its axis at a consistent speed. The Sun also rotates, but differentially, which means it rotates faster at the equator than it does at the polls. The way in which we can tell that the sun rotates is that we can track the sunspots as they move across the solar surface, and this gives us the axis of rotation and its speed. From these measurements, they have determined the sun's rotation at the equator as once every 27 days, and at each pole as once every 31 days.
Like the Earth, the Sun also rotates on its axis. The time for it complete one rotation is around 27 days. The rotation of the Sun can be noticed by looking at the motion of sun spots. Like the Earth’s axis of rotation is tilted with respect to its orbit around the Sun, the Sun’s axis of rotation is also tilted by about 7.25 degrees from the axis of the Earth's orbit. So we see more of Sun’s North Pole and South Pole depending on which month of the year it is. Unlike the Earth which is a solid mass, the sun is gaseous, this makes different regions of the Sun rotate at a different speed. For example the equatorial regions take only 24 days while the Polar Regions take 30 days.