[Trix]

You sure K9 is enough hand to open when you have that guy behind you, he will probably 3bet many of the better hands that TAGs will fold and K9 seem marginal from CO normally to me.

Flop line seems good as there are alot of hands he wont fold for 2 that you want him to fold.

Turn is probably too optimistic, the 9s are probably worth around 1.5 outs, but the K/Q can´t be worth much, due to splits or losing when making them anyway.
Folding first time is probably the best action.

I´m not sure I like a fold if raised on the river since he may be clowning it up with 98,Q9 or such. He will probably bet alot of the time if we check, so check-calling might be better.