You will need the same tools you would use for performing the same task elsewhere in the house. You might want — if there is space or access from the outside — to rig up a pulley system to lift heavy building materials instead of trying to carry them up stairs or through small openings. In addition to safety glasses and work gloves, you will spend long periods of time on your knees, so you might want to invest in knee pads. And, in warm weather, because of the heat and the fact that some tasks cannot be interrupted once started, you should also have a good supply of water.
What special equipment will I need to finish my attic?