You need to rewatch that episode. He did not beat him because Walt asked him not to. Tuco kicked his ass because that guy spoke in his stead. Which is a definate beating offense.
As far as walt killing Tuco it will never happen he knows that Tuco if formost a buisnessman which he learned when he got the loan from him.
On top of that Tuco is to high up to be a snitch unlike that bitch crazy 8 and you dont get that high up unless you have a decent head on your shoulders. Everything he did he had a reason for i think he and walt will be seeing each other for a good while and well they should, everyone will make alot of money.

Tuco is that you?

If you have watched this show cover to cover you know that the main plot device is that Walt is standing up now. Tuco will blow himself up via Walt.

I agree. Rewatch the episode... or the entire series.

"a decent head on your shoulders"?

LOL

If you think tuco represents anything other than the bad, crazy and ultimately self destructive side of meth than you need to literally put the pipe down before you watch this show.

*now you have me laughing at the visual of a toothless bloodyfaced "fan" sitting in their roach motel grooving on the Tuco character and hoping that he somehow gets his own spin-off reality show because he Represents. LOL

Tuco will eventually have to die. I doubt he will be alright with walt and jesse saying that they are done cooking, when they've made enough cash.

I think Walt is Learning from Tuco. He knows he can't make the kind of money he is now if Tuco was gone. I don't think Tuco has "a decent head on his shoulders", but he does know what he is doing when it comes to running his meth business. I think Walt after a while will learn enough about the whole selling meth thing to be able to take over the role of Tuco. Possibly killing him, however, that could cause a problem because of Tucos henchmen. Maybe Walt could get Tucos men to take his side and turn on Tuco. Then possibly fake deadly meth.

Most likely though i see Tuco being a permanent character. He represents the bad and kind of a third side. Walt knows Tuco is good at what he does and that he couldn't do as well him self. Also Tuco is really starting to like Walt. I see Walt exploiting this later to get more money.

Oh and Walt is not going to quit cooking if doesn't have to. He is starting to like the rush he gets from cooking and selling. if anything he will scale up his operations. The only way he stops is if he dies or is sent to jail. Walt will never have enough money because how could you ever put a limit on what you leave behind for your family.

My conclusion is Walt cooks until the bitter end and Tuco stays.

Final show of the series:
Walt dies but before he does he brings down the meth ring in his city also he comes clean with his wife. Jesse, after seeing Tuco for so long breaks his drug addictions and gets away clean. Oh Hank and his wife get divorced after he finds out all the bad stuff his wife is into. (maybe not in final show but some time along the way) final scenes will be Hank, Jesse, Skyler, and the kid at either Walts funeral or wake or something along those lines. Tuco in jail. hopefully taking it from his cell mate.

I dunno...I think these beat down scenes with Tuco represents something else. Notice that Tuco beat the piss out of Jesse after he did a couple of hits of the meth they brought him. Notice also in the following episode that Tuco didn't beat the crap out of Walt (admittedly there was some explosive persuasion, but Tuco also didn't do any meth in that scene). And again, Tuco took a hit of the blue meth in the junk yard, and beat up one of his own guys. I'd say that his violent behavior is linked to doing meth. Walt might have made this connection, and suddenly recognized what his product is doing to people. It makes them crazy and irrational, and winds up hurting more than just the user.