Ceausescu was obsessed with paying off the countries debt. He sold raw materials to foreign countries. Leading to extreme shortages of food, heating, and electricity.
Many died of asphyxiation as gas stoves -- the only source of heat for many -- were shut off, then turned back on without warning, filling sleeping apartments with gas. Many died from this.
Vehicles were now prowling through Bucharest, but the soldiers inside showed little will to fire on protesters. Soon the army went over to the revolution and tanks carrying cheering protesters were roaring through the streets.