If I read the history correctly, you coldcalled without any players in between you coldcalling first - I don't think this is horribly awful or anything but I would not coldcall here with a pair. This is a raise or fold situaition for me. Sometimes someone raises and then 1 or two people coldcall - then I think it is fine, but I wouldn't do it here with 66. You just can't be sure thay you will get enough odds to hit. And this is true for me in live games as well which are usually looser preflop.

Well, to make this OK, we need to optimistically assume that both limpers will just call and not raise, and that the blinds will just flat call and that will give us 6 players. We have ~11.5% chance of flopping a set which is really the only hand we can play after the flop with 66 in a multiway raised pot. So we really don't have immediate odds to cold call (although we arguably have implied odds)
The problem is that there is some chance that someone will three-bet, there is some chance people will fold and this will all diminish our odds. Alot of SB and some BB players will fold here. You do have good position, but it doesn't help you that much since there is no way you are going past the flop without a set anyway.
If I am going to cold call here I would rather have suited connectors, it opens your options up more, you can raise for a free card on the flop if you have a draw and get to see all 5 cards, etc.....there is just more of an ability to "play poker" than with a small PP.

This is why I prefer a raise or fold, if your reads allow you to raise, it gives you another way to win the pot with aggression.

One thing I've noticed in live games, when my image is that of being tight-aggressive - if the CO or MP raises first in, I can coldcall with a mediocre hand occasionally and they immediately put me on a monster and think I'm slowplaying AA or KK. They give that "you just called?" look. I can then take the pot with a flop raise or bet - they will often turbomuck into the pot when I raise thinking they are crushed.
You have to have a really good image to the person you are doing this to for it to work.