Yes
about 4
You can't buy rare candy in fire red. You can find them all over the region though.
There is one. Use Strength on a boulder to get the Rare Candy
if you want to get 999 rare candies you need to get a gameshark.
by finding them
You can't. There are only a few rare candies in the game, unless you keep trading.
there is no way
You can't.
yes there is you olnly need a meoth with it's pick up abilitie and it will give you rare candies and some other usefull items
Yes threre is a way, you can catch a couple of meowths and they might pick up rare candies. You can also trade to Emerald and copy them.
You can't buy rare candies in fire red. You can only find them, if you don't use cheats.