Hmm I think those thread in behind the wall but I can't remember.
After watching my parents my whole life and now my younger brother work on their older homes (parents built in 1901) I think I can guide you through this without too much trouble:
1. Attempt to remove pipe from wall. It will likely break the main plumbing behind the wall.
2. Remove tile around broken pipe and attempt to gain a little more access to it.
3. Pull down all the tile because you weren't able to remove just a small section without destroying everything.
4. Go to Lowes* and buy new stylish tile, plumbing hardware, stylish new sink, stylish new flooring, stylish new vanity, tub (because you have the bathroom ripped apart anyway and old tubs are too small to fit in)
5. Knock a wall down to make room for your new tub.
6. Go back to Lowes and buy sheet rock (because you find lath and plaster is impossible to work with) and electrical misc (outlets, wire etc.) because you realize older bathrooms don't have nearly enough outlets when you have a Chi, hairdryer, curling iron etc all needing to be plugged in at the same time.
7. Go back to Lowes for plywood because you find out your floor isn't level.
8. Go back to Lowes and buy a shower head and plumbing hardware because you've always wanted a shower head that is actually above your head.
9. Pull the ceiling down because you have always wanted a vent fan.
10. Go back to Lowes for more sheet rock and a ceiling fan.
*Home Depot is an option as well.
Once you've completed step ten report back and I'll provide you with the next ten steps. There will be about 1000 steps total