First to act I may bet, check the turn unimproved.

I may check and look for odds to call back to me.

In position, I'll probably raise a smallish bet so they give me a free card.

I'll probably bet if checked to me for that same free card.

With a pair, your outs usually improve against most hands. You've got a good chance of showing down a winner but you could easily be moved off the pot if someone does pot or overbet behind you. So you should bet to keep yourself in it.

-'rilla