Starting/parking car - advice required

Hi Folks

I have a Seat Ibiza 2011.

When you park the car at (say) night time, do you leave the gear stick in the neutral position or 1st gear (if uphill) or reverse (if downhill).

What is the best position gear to leave the car in?

Also, when starting the car is it essential to put it in gear first, then press the clutch pedal, and then turn the car engine on? Do you folks do it any different?

Thanks in advance for your responses.