The majority of the points you listed are all related to first aid. Take a dog first aid course. They are offered by a lot of clubs, and there is tons of information on the internet. Dog first aid is not the same as HUMAN first aid...however, a lot of things can be related. I am active in search and rescue with my dog. I have an extensive kit for him that comes with me pretty much everywhere. There are many many many emergency vet clinics in my area, so it's not hard for me to get to a vet at any time 24/7...however, it is important to know how to deal with seizures, broken limbs, etc. Learn how to splint. Learn how to bind your dog to stop them from thrashing. I have a soft muzzle in my kit which is hugely important in emergency situations. Ambulances will not help you for any type of animal emergency. At least, I know they won't here. You are on your own. I have a truck. In my truck I have a first aid kit for him, garbage bags, blankets and all the necessary emergency equipment you could think of plus more. I really like being "prepared", it;s just something I was taught at a very young age. I have lots of trauma pads and things like that in the truck in my "human" fist aid kit. As for dealing with dog fights, I'm trained in wrangling so that doesn't really intimidate me.
Bottom line, educate yourself as much as possible. Be prepared. Build your own first aid kits, so you know what you have, and how to us everything in it.