This would be something equivalent to the Town Square or The Main market, and in Spanish this would be called "Plaza".
So for example, this place in Mexico City is called Plaza de la Constitución (although it's known as Zocalo to most)
Stove (Chemical Energy into Thermal Energy) and a bulb ,coversion of electricity to heat n light energy
I think empiezas is your answer. Good Luck!
Number 2 is pants
it’s equal to jeans