No. Mixing different species is not recommended and you may well end up with a seriously injured or dead hamster. They don't have the same care requirements, and would gain nothing from the interaction.
Sanitize the cage and get new bedding and the cage is good as new!
you put it in the same cage with a male hamster
No they will fight.
no
I think so because I keep my hamster in the same cage I kept my last hamster in. I dont know for sure so ask a proffesional
NEVER put the new hamster in the same cage, with same stuff! BOIL the toys, cage, in warm, soapy water for 30 minutes! If you don't you are most likely to have another sick/dead hamster :( The disease might remain in the same cage where the sick hamster may have touched, nibbled or made any contact with. Stay safe!
yes, mine are both in the same cage
No.They will fight
That depends on the type of hamster.
It's not advised, no.
yes, you can have up two in one cage.
No its not, i guinea pigs cage is way bigger. & you should not have the same size of guinea pig cage as your hampster.