Do all the planets rotate in same direction?

No ,the planet Venus rotate in a direction opposite the other planets.I have read about are that planets from dust particles and similar things hitting each other and sticking together till they get bigger and bigger. A planet like Venus probably got to be it is present size from the collision of smaller "planets". The last two small planets to collide in forming the planets we see today determine it is rotation by how they happen to hit each other. The rotation of a planet is only changed by forces that act perpendicular to the rotation axis (actually called torques) for a planet in space there are not many of these.Planets continue to rotate mostly because there are very few forces that act to slow them down.