you will need to have Poke Flute to awaken the sleeping Snorlax who is blocking the way.
Celadon city. You can get there by following the underground path on the West of Lavender town.
There is no Gym in lavender town. You can find team rocket in Pokemon Tower tho
no
Lavender town is in Pokemon red, blue, yellow, firered leafgreen. NOT GOLD. also the tower in LAVENDER IS POKEMON TOWER. Defeat it to get pokeflute to get past snorlax
From Lavender Town you need to head west, eventually you will come across an entrance to an Underground Path. Take this to get to Celadon City.
you go to celadon city
In lavender town
lavender town I'm pretty sure
Get the Pokemon flute from Mr.Fiji in Lavender town after you rescue him
When you get in Lavender Town, go west and you will find a tunnel. That tunnel leads to the Celadon City. You will only get the silph scope and finish the gym there then go back to Lavender to get the Poke Flute.
Go to the namerater in Lavender Town or rename it right after you catch it.
You need a pokeflute. You get it after you complete lavender town.