You Cant
The ocean one in the museum.
The Dome Fossil can be revived into the pokemon kabuto.
Helix
Fossils cannot be created in Pokemon FireRed, there is a finite number of them to find.
The Left One
If taken to cinnbar island's research lab you can revive the Pokemon inside the fossil which will be Kabuto.
At cinnabar island at the pokemon lab third door.
The orbs are not in firered.
Take it to the museum in cinnabar city to have it revived
cinnabar island research center
Queen Elizabeth the second.
Yeah you can. You can ask a friend who has one of the Kanto Games to trade a Pokemon holding the fossil and you can regenerate it, breed another Pokemon of the fossil it regenerates, then trade back!