You can buy a pet cat at the age of 13 in my part of the world, long's you have the money and your folks are OK with it....
A 13 year old cat in cat years is 13 years old... in human years 68 years old.
No. The average cat in a feral cat colony (similar to the clans in the warriors series) lives to be about 5 years old, so a 13 year old cat would be long dead. However, if you are referring to the age of 13 by human standards, than yes. A youthful, not fully matured cat (as humans are around the age of 13) would be an apprentice in the warriors series.
Wild cats can live between 13 and 14 years. However, this age varies depending on environmental conditions, as well as the health of the cat.
You multiply the age of your cat by seven. For example, if your cat is 2 years old, you would do 2x7 which is 14, so your cat's age in cat years is 14.
Cat-naps: This is where we get the term 'Cat-naps'. Cats spend a great deal of their time sleeping. The average cat sleeps for 13-18 hours a day. The exact number can change according to the cat's age and personality. Cats that spend the day alone at home tend to sleep throughout the day.
If the cat is 13 years and 2 months in 'regular', human, years, then in cat years, how old it really is in their world, it is about 72 years. If it is 13 years in 2 months in cat years, if you go backwards (or at least backwards from our point of view) the cat is only 6 months old. I say all this because usually people ask this type of question like, "How old is your 13 year old and 2 month old Persian cat in cat years?" because the vet told them they were that age and they want to find out how old they are in CAT years. Your question was a little confusing to me on which one you meant, so I put in both ways. :)
A good feline veterinarian can tell the general age of a cat by examining its teeth.
Legally 13 or over :L
It depends on the cat's breed, age, ect.
36 weeks
After your cat stop growing!
13 pairs including the floating ribs that do not connect to the sternum.