I completely agree with everyone above. I was also going to mention as far as the leading problem (where you said he wants to rip your sockets out for grass), I would put a shank over his nose, DONT abuse him, teach him to respect you (also a rope on the gums under the upper lip works well, but this should only be done with someone with some experience. when done the correct way, it is a great pressure point that releases endorphins in the brain and naturally calms/relaxes the animal). I don't know if he raced and if so how much he was ever ridden after retiring from racing, but if that's the case, when you do start him under saddle, make sure to keep in mind, when we ride racehorses, their cue to go faster at the top of the lane, is us more or less tightening the reins. We do what's called "throwing a cross" (if you've ever watched a race closely, you'll see riders swing their arm out periodically around the turn at down the lane, this is throwing a cross) and what this does is re-loops the half cross in our reins, taking up any extra slack that may be in the reins from the first part of the race, and getting contact w/ their mouth (not pulling, just contact) and holding them together while he get in rhythm and ride them down the lane. Therefore, you'll also notice that down the backside or in the first part of the race, we have longer reins w/ looser contact, this gets them to relax. This is why most TB's are actually easier to train in the sense of less hands, more leg, great for teaching riders as well! Good luck, keep us updated, sure hope some of this helps!
"A righteous man has regard for the life of his beast"-Proverbs 12:10-