Provided you remember the 1 inch of fish to 1 gallon of water rule yes Betta splendens (Fighter) and Apistogramma ramirezi (Ram) will be OK together.
Yes they will.
The male of the species has brighter colours and is a much larger fish than the female
Yes, you can just not have 2 male bettas together.
Yes, but only when the male/female is too old or too young.
Yes. If they are left in with the male for too long he will eventually eat them.
If you are talking about reproduction then that would depend upon the genetics of the breeding pair. A none crowned fish (male or female) may carry crowned genes and throw some crowned young.
The only time a male and female betta or fighting fish should be together is when they breed. Otherwise it's better to separate them before one or the other dies.
The male Betta will only fight another male Betta. They are slow, timid and peacefull fish except when another fish of the same sex and species is in the same vicinity.
The male Siamese fighting fish (or Betta splendens) will only fight with another male of the same species. Under normal circumstances they are a quiet, slow moving and peacefull fish. It is only when another male of the same species is introduced to its tank that the Betta becomes territorial and aggressive.
None, they are dominant creatures you can rarely put them in a tank with another fish. Not sure about a female one with a male but still not best to be tried with. ;)
Swordfish often fight each other for the right to mate with females or for territory. These fish are very large and very territorial and will often even fight with humans who enter their area.
The male will only put up with a female while he is courting and breeding with her. Once the spawning process is over he will kill her if she is not removed from the tank.