Usually they give you your unused vacation pay, but not your unused sick leave.
They have to give you your 401k, and they may let you keep it with them. The advantage is you can tap a 401k at age 55. Otherwise you can roll the money over to a IRA like Fidelity. You can make an appointment at a fidelity office and they will help you with the paperwork.
You also have the pension, but you may not be able to draw on it until you are 65.