Another Small Pocket Pair Post -- Fundamentals (boring)

[Knockwurst]

I too have problems with playing small and medium pocket pairs. So I have some general questions.

Say you have four people limping, do you like raising or calling with TT-77 on the button or CO? What if four players have cold called a raise and you're on the button or CO? Anyone three bet?

Let me give a hypothetical hand:

Hypothetical Hand #1

Four players limp -- you're on the button with 9h9s. What do you do? Let's say you raise and limpers and BB calls.

Now Ks 8s 2h flops

Check, check, bet, fold, CO raises, it's on you -- fold?

What if it's checked to you? What if there's a bet and a call?

Let's say it's checked to you, you bet and get two callers.

Turn is Td

Check, bet and its up to you. Fold or call?

River is an 4s (making a possible flush)

Checked to you.

Thanks in advance.