new

hi first sorry for my bad eng
well im new to pokemon World i didnt watch the anime or play anygame before i dont know nothing about pokemon i find the game on youtube it look cool nd im playing it pokemon firered after it i will play pokemon leafgreen and then emerald
those are the pokemons i have i only play with squirtle and sometimes pidgey i just win against brook
i have some questions
1- wich pokemons should i catch and use to help me complet the game
2- i have problem when squirtle level up i get new skills and they told me i should forget another 1 to use it and i did that so next time when thats happen how could i know if the new skills is good to use or no(for all pokemons)
3-rock tomb i know i could use in 1 pokemon wich one i chose and the same for next skills i get ( that i could use in 1 pokemon)
4- an npc told me that there is skills that help me cut trees that block roads wich skills and in what pokemon i could find it ?