Hi, I'm a pre PT major, and I can tell you confidently that Precum is actually the way that the penis lubricates itself. This "Precum" is not related to actual cum

Yes, but it's highly unlikely that you will

The chance of getting pregnant from pre cum is very low. The highest chance is when he doesn't pee after his last ejaculation.

Yeah a slim chance though pull out method is about 75%. I lost my virginity at the age of 16 and I've used this method loads of time and never got pregnant but every woman is different!