Miss straight draw on the river

He can have so many weak hits or even slowplayed nuts. I think we can't bluff catch with K high.

If you are Doyle Brunson, you can bluff catch with J high if you think it is correct. If you are as good at reading hands and opponents as Doyle, then go ahead if you think it is right.

Is CO the kind of player dealing with Q♣:T♣/Q♣:J♣:: this way, and are you 30% confident he has it (this is the only type of hand that makes much sense as far as I can see)? If he has AT instead, you'll be sorry.

Just fold and move on.

I would never ever consider calling here, you don't even beat Ace high and Villain could have an underpair, pocket tens, even a slowplayed set or a straight. It's highly unlikely that he's bluffing here for almost half the size of the pot.

I definitely wouldn't call the river. It'd be disastrous for him to be bluffing something like A6s on the river and winning. You block a lot of his missed draws since you have a T in your hand and you also are hoping he's bluffing with naked 6x or something- not a good assumption. Fold the river.

And what about beting the turn? He seems to have a week hand. I think he always have TJ and a looott of week hands that we can force to fold

He also has good hands that will call 2 streets. He might have a draw with a pair that is not going to fold OTT but beats us OTR. Our equity just decreased because there is only one card to come so our bet would require bigger fold equity.
As a general rule I would say that when you bet the flop with a draw, only bet the turn when you get more outs.