ah about those 3 pokes , we rly should be able to get a bulbasaur/charmander/squirtle as a starting pokemon... oh and a last questiooon how much is the highest lvl of pokemon? like 100 or smth?
About what you said. Bulbasaur, Squirtle, Charmander will be level 1. In the PokeDex they require lvl 1 so if you catch one of them you will be able to use one of them If you catch the 3, congratulations anyway
About the trainer level I dont know if there's a limit but you will be able to past from level 100+
Regards.