Using expressions can the "text" property of a text layer read a transform value of its position.

Could be as trivial as inserting a 

mRef=thisLayer.transform.position;

mRef[0]+\r+mRef[1]+\r+mRef[2]

into the source text property. Of course you may need some extra code to not end up with endless number salad like adding toFixed() or a rounding function for the decimals, but as Roland already said, that would require a better explanation of what you are actually trying to do.

Mylenium

What do you mean by "text property" of a Text Layer?

If you want to display, in the Comp Panel, the values/data for a layer, say, Layer>Transform>Position then all you have to do is drag that property, from the timeline into the Comp Panel.  

HTH