Nohr's starters
Charmander
Piplup
Snivy

Hoshido's Starters
Chimchar
Oshawott
Treecko

Ylisse's Starters
Torchic
Froakie
Bulbasaur

Each nation will also lend an Eevee to any trainer who's not picking either one of the starters at the 1st day of school.
There are plenty of classes for school
Battle(Single,Double,Triple,Rotation)
Health
Breeding
Contest
General education(Math,Reading,Science,other stuff)
Items

As you are aware of, Nohr will focus more on the Battle courses than Hoshido would and Hoshido will focus more on Health and Contests as Ylisse will share attention on both subjects....Each 3 school will be like an university where the students will live there, with 4 years from age 14-18 students. 700-1600 students in Ylisse....650-1350 in Hoshido...and 800-1700 in Nohr...