being beat with top pair

hello anyone know so so the chances of being beat on flop (before turn/river) if you have top pair with low kicker (ie, top pair with higher kicker, 2 pairs or set)? and with high kicker (2 pairs or set)? supposing: 1) it's not possible to flush/straight from the flop 2) we're playing against 1 or 2 opponents (I just want to have an idea)

The odds of facing 2 pair or a set are GREATLY increased in an unraised pot. You are more likely to be out-kicked in a raised pot. We need to know the action that takes place before the flop.