I am so confused....holde'm odds questions.

The more I work on this the more confused I become.
I know (been told) that ie. 67s on the button is 5/1 to hit either a straight or a flush. Hence: I am getting good odds to call (even a raise) if there are 5 limpers in front of me. As long as there are $5 for every $1 of mine I should see the flop. Right? My question is what are the odds for (late position)hands like: 67o, 68s, 68o, K9s, K9o. I am trying to figue out how many limpers I need to play suited one and two gap hands, and non-suited one and two gap hands. I want to add a few hands to my late position play. I am not going to call with 68s when early rocks open. But in loose games and late position I think I'm missing some EV. Thanks in adavance for the help!!!