Ok I would definately pick Cyndaquil hands down. I usually use him he has very good stats and overall will be the most useful. How can you go wrong with this moveset: Sunny Day, Flamethrower, Earthquake, and Thunderpunch. With a moveset like that he is definately the favorite. Next I will go with Chikorita, because like Cyndaquil he has some diversity especially considering it's a Grass-type. My ideal moveset for Meganium would be this: Light Screen, Razor Leaf, Synthesis, and Body Slam.
Totodile? Eh? To me he is disappointing he generally lacks SpAtk when he is a WATER type? When you pick a starter you pick them for diversity or what suits you. If you pick Totodile you eventually may end up using Vaporeon, Lapras, Starmie, Lanturn, Octillery, or Seaking they all have better SpAtk which makes me think dang you really can't take advantage of Feraligatr's type. Feraligatr is too physical and gets no STAB from the physical attacks. If I want physical pokemon I'll use a Donphan, Ursaring, Snorlax, Steelix, Golem, Rhydon and etc.