A cat is usually able to breed at 6 months, but it is good to wait until it is 1 year old to reduce risks. Color doesn't matter for when it is ready to breed.
Tortoiseshell is a natural-occuring cat color, so it would be almost impossible to guess her breed, as many breeds can be tortoiseshell.
A calico and tortoiseshell cat can appear in the same breed. Neither type of cats refer to specific breed, instead speaks of a coat pattern found on a cat.
Yes, tuxedo cat doesn't refer to a breed of cat like the Tortoiseshell does, it refers to the color of the cat which can be either male or female
Yes, the purebred Brumese cat can have a tortoiseshell coat.
Before I answer, I feel it necessary to point out that a Tortoiseshell is not a breed, only a color variation. But about the Persian thing, the only cats I know that came from the Persian are Himalayans, and the Exotics. Breeding a Persian and a Domestic Shorthair (moggy) whom has no pedigree would result in mixed-breed moggy kittens.
By breeding it with a lion.
Tortoiseshell, Tortoiseshell and White, Bi-colour or Calico
Tortoiseshell cats are not predisposed to gain weight more than any other breed of domesticated cat. All cats will gain weight if fed too much food and not are inactive.
Tawnypelt is a character from the Warriors series of books, in which she is depicted as a tabby cat with long fur. In the books, her lineage is not explicitly stated as being a mix breed, but rather she is described as a tabby with amber eyes.
Generally, the skin color of the domestic cat is similar to the fur color at that spot. If you shave a tortoiseshell cat, she will still be tortoiseshell colored.
Tortoiseshell
Hi there...you may be describing a Tortoiseshell Calico cat. Their patterns vary, but generally have the colouration you describe. Here are some photos of Tortoiseshell Calico cats: http://images.google.com/images?hl=en&q=tortoiseshell+calico&btnG=Search+Images&gbv=2