Yes they can, but they need natural food for a longer life.
Guppies are community fish that should never be kept alone or in bowls they require large tank, at least 10 gallons.
fish tank
guppies have live fry
Yes - there is virtually no limit to how many female guppies can live together.
Guppies are compatible with Bristlenose catfish, the bristlenose being one of a few catfish that can live with guppies because of the guppies' water.
Guppies can live very happily with heaps of other species of tropical fish
The tiger fish would eat the guppies.
No. Guppies need a heater, whereas gold fish will overheat. Also, they will eat the guppies.
Guppies do not lay eggs they give birth to live young.
No, All adult fish will eat baby guppies.
not a chance. you could buy guppies as feeder fish for them though.
You do not say if the guppies are common guppies or fancy, also how many male and female guppies you have, yes as far as the snails and guppies go, one point to remember is the tank water should be above 72 degrees and some live floating plants for the guppies too hide in.