Yes, halogen lights generate extreme heat. Always use heat-resistant 'scrim' gloves when adjusting barn doors and ensure the unit has cooled for 15 minutes before packing.
Yes, a 1000W light draws roughly 4.3A to 8.3A depending on your local voltage, which is well within the limits of a standard 10A or 16A domestic socket.
Yes, it is 100% dimmable using an external 1k-rated electronic dimmer. Note that dimming will cause the color temperature to shift towards a warmer orange hue.