No, poison will leave you on half a heart, it will not kill you.
You can eat it ,but it would more likely to poison you but don't worry its fine it would not kill you.If you train a wolf as your dog you can breed it ,but you have to have enough of rotten flesh.
You kill skeletons
Water bottle+ Neather warts= Awkward potion Awkward potion+ Spider Eye= Potion of poison Potion of poison+ Gunpowder= Splash potion of poison
you get carrots in minecraft from baby zombies on chickens or spiders, you have to kill them and then you will get them.
you have to kill spiders