My experiences are a little different...

DS1 born 30+1 weeks.
1. I was never induced.
2. Pushed for less than 30 mins.
3. Waters broke at 6:30pm on the 10th of Feb first lot of pain relief was given at approx 8:30pm on the 24th of Feb. Contractions were uncomfortable for the 2 weeks before, becoming VERY painful at 6:30am on the 24th. I was on magnesium drip, antibiotics drip and nefadapine (sp?) to stop contractions and reduce risk of infection and also the risk of CP, ect to bub.
4. No idea, mine were regular from waking up at 6:30am on the 24th, prior to that was referred to as "pre-labour" with irregular uncomfortable contractions.

DS2 born 34+3 weeks.
1. Not induced
2. Pushed less than 30 mins
3. Waters were artificially broken approx 2 hours before he was born. Contractions started at 26 weeks and didn't become regular until 34+2 weeks. I was given pain relief after 7 hours of solid contractions.
4. Again no idea sorry.

Both times I BEGGED for pain relief.

I hope that sort of helps