Electric stoves use 2,000-5,000 watts per hour. Gas burners typically use 7,000 BTUs per hour, and gas ovens, 16,000.
Gas stoves ignite the gas with a spark. The electric igniter can fail. Very old units might have a small, always-on flame called a pilot light instead of an igniter.
A well-maintained stove is safer and gives you more control over your cooking.