I don't know what tower you're talking about but I'f it's the ghost one you need the silph scope to see the ghost, It's a marowack but you cant capture it, because it's still a ghost but you can see it with silph scope.
what 6 floor
You must beat team rocket first, then they will go to the radio tower and you can now pass to the 1st floor just to beat them. After beating them in one town, from now on you can pass that floor.
first you need to get cut then go to cerulean cut the tree then pass rocktunnel go to lavender town, Then you go to the pokemon tower and fight your way to the top!
by looking.
The rainbow pass is a key item in Pokemon FireRed version. To trigger the events to get it, you first need to own 60 different Pokemon.
beat the elite 4
have at least 60 Pokemon in your'e pokedex , then , you talk to oak and he'll give you the sevi pass .
by going through it
you put the bulders in the dark hole
close your eyes ..... and count to ten
no !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
you go to the Pokemon tower