In order to fight Cilian (dent) you will need to start with Oshawott.
Yes, you do get to choose a starter Pokemon in Pokemon Black and White Versions.
Yes
You have to trade a starter to another Pokemon white or black game then trade the Pokemon back.
No.
No
black and white
you should get Pokemon white and choose TEPIG AS your starter.
You cant
Level 5
If you have Pokemon White Virsion then you can in white forest, if you have Pokemon Black Virsion then you must trade it from Pokemon White
The Starter Pokémon in Pokémon Black 2 and Pokémon White 2 are Oshawott, Tepig and Snivy.
There are 8 Gyms and 12 Gym Leaders. there is 3 in the first gym but you only battle 1 depending on the starter Pokemon you have and there is 2 in the last gym you battle iris if u hav Pokemon white and u battle the other if u hav Pokemon black