I don't think the amounts of points gained for each rarity have
been specified anywhere, aside from the trainerlevel wiki page stating that an event egg gives
you 75 points as an example. I'd imagine a starter egg would give
you slightly less, maybe 50(+)? You can certainly test that out
yourself though. Adopt a starter egg, check your trainerpoints and
note it down. Don't do anything else that would give you points and
wait for the egg to hatch. Check your points again and see how much
you gained.