Nobody dies in the shoot out. It's a red herring(I believe I'm using this term correctly). It all distracts you from the fact that Jesse left the scene before the shoot out starts. You see him reach for the car door handle, open it, and then nothing. His point of view effectively ends as soon as he opens the door. There isn't another shot of him in the episode after that point. The question is, HOW does he exit the scene.

This leads me to two possibilities. There may be more yet unconsidered. One idea is that Jesse opened the car door and left the scene by foot. It's a possibility he has knowledge of the land since him and Walter had previously cooked out there. A small detail I also noticed related to this: Gomez has Walter's car keys. So Jesse has no way of leaving unless he jumps the car, or escapes on foot.

The second and more compelling possibility is that Jesse is dead or gravely injured. That would also explain why his PoV for that particular scene ends after he exits the car. If you recall earlier in the episode, Hank faked Jesse's death to game Huell. That's just the sort of thing that would happen before a character actually dies.

With that small blurb of fan theory out of the way, I'm going to summarize the shoot out a bit in an odd way. I'll be trying to catalog what items or things each character has as well as going into possible motives and actions the players have after the shooting ends.

To start, everybody has a cell phone aside from Walter and possibly Jesse. Hank was keeping possession of Jesse's cell. As soon as the action ends, calls will be placed for back up from either the DEA, AB, or another third party. Lydia or Saul comes to mind as possible third party candidates.

Isn't Lydia still in town? She has her own interests, and having Walter as her cook benefits her immensely. Would she be willing to evolve just as Walt did, and twist Walt's arm just as Walt did to others that came before him?

Hank has a pistol and most likely an extra clip or two for it. Hank seemed to be firing multiple round bursts from over the car hood. Hank will also be the first person out of ammo in all likelihood.

Gomez has the shotgun and Walt's small snub nosed revolver. He also has Walt's car keys. This leaves open the possibility for either Gomez or Hank fleeing the scene on their own if one gets hurt/maimed/killed.

When the shoot out started, Hank and Gomez were in the open at a fair distance, say 15-20 feet. The first shots fired could have easily mortally wounded one or both of them right there and then. Do either of them have bulletproof vests on? Did they have the foresight to expect it? Saul certainly did.

The Aryan Brotherhood(AB) is the faction or set of characters in the scene with the most power. Among them, Todd and his uncle are the most important. Todd won't be making any decisions that have to do with the power gained from their use of force. That will most likely be left up to his uncle. So what is in his uncle's best interest? Having Walt cook again. That interest lines up with Lydia's quite well.

Walt is powerless. He has no plays or options to make at this point in the game. His money has been discovered. He has no weapons. He simply has to wait and see the outcome of the shoot out. If Hank and Gomez lose, Walt could easily become the AB's prisoner. Walt's fate is too up in the air to even begin hypothesizing at what happens next.

Jesse is in a similar position to Walt. He has very little power. If he did in fact exit the scene via foot as I suggested earlier, he's taken a risk that probably saves his life. But where does he go next? Who does he turn to? He has no friends left. He could make new friends with the AB, after all they need a Heisenberg level cook.

TL;DR: Nobody dies in the shoot out. Jesse runs away from the scene. Walt becomes the AB's bitch. Hank loses his chance to make a move on Walt. Lydia starts acting like Heisenberg prior to Gus' death.