How many mistakes did I make

[Gahnia radula]

I was playing in a very loose 4/8 holdem game and was right of the button. I called with KTo the dealer called the SB called and the BB check.
The flop came A 4 Q (rainbow). The SB bet and the BB rasied.
I folded.
The turn came 7 and the river came J, giving me the nut straight.

AT the end of the hand I was very annoyed at myself. But the more I though about it, the more I think I played it correctly.

Was it a mistake to call with KTo. The game was very loose and players were calling with just about anything...even 27o. I called the KTo because I thought my K could hold up given the trash these player were calling.

Also was I right NOT to coldcall, with my gutshot straight. Were the odds againts me (I thought they were).

Comments please