The most popular breeds of hamsters are dwarfs, Chinese, and Teddy Bear (Syrian)/Golden) hamsters. I wouldn't be able to tell what breed of hamster you have without seeing it. But I can give a description of each one. There are many types of dwarf hamsters including the Campbell's Dwarf Hamster, Russian Dwarf Hamster and Roborovski Hamster. They are the smallest of the hamsters with the Robo(rovski) measuring just 2 inches when fully grown, their colors range from white to dark gray and often have a darker dorsal stripe. The Chinese hamster compared to other hamsters has a longer tail (around 2cm) and a thinner longer body, their natural coat is browny grey with a dorsal stripe but other color variations are available. Finally the Syrian hamster is much bigger than Chinese and Dwarves and their coat is commonly a 'golden' brown. They can grow to around 7 inches when fully mature. The picture above is of a Syrian hamster.
The Golden/Syrian hamster is the most popular breed.
No, they will fight
Yes you can breed any animal with its own breed as long as there in the same category
You don't breed hamster babies until there at least 1 year old
The smallest breed is the robo breed.
No, they are not interbreedable.
Christel may be a hamster's name, but it surely isn't a breed of hamster.
No, you can't.
No, you can't.
No, you can't.
no but there is a breed called the black bellied hamster
Yes, i believe it's possible.