Under what circumstance do you call raises.

I am not talking about 3-betting -- I will 3 bet with QQ+ AK+ and other hands under different circumstances

Assume full stacks

For example standard TAG raises from Mid Position --
No other callers
I have position
I call with any pair , AQs

Now what if there is another caller before you act.
TAG raises from early to mid position.
Another TAG/sTAG calls
I have position
what do you call with?

What if there are two callers?

What do you do from the blinds?