Given that anoles are arboreal reptiles (that is, they like to climb trees and branches), height is a very important factor with anoles.

Generally I like to give about 2 cubic feet for the first anole, and then 1 cubic foot per each anole after. If you have a very large enclosure (10 cubic feet or more), with lots if hiding and basking areas, it is possible (although not necessarily advisable) to keep a couple of males together.

That depends on your definition of "pet". If a fish is a pet, then yes, anoles make great pets. You feed them, you keep your tank clean, and you enjoy the beautiful vision that you see each day.

They are not animals which you can handle, and you should avoid touching them unless under emergency conditions - bullying from tankmates, requiring a vet visit, etc.

Anoles, as with pretty much all diurnal (daytime) reptiles, need UVB lighting to synthesize vitamin D3. This is a very serious requirement with anoles, more so than any other reptile in my opinion, as they certainly do not flourish without it.

Other than the mating displays between the two sexes, there's not much difference. Males use the same threat movements to scare other males from their territories year-round.

Females do change a little, in that they need to locate places to safely drop their eggs, and possibly scare away other females. With brown anoles, at least, they have been known to dig up another female's nest and lay their own eggs in their place.

Although, also with brown anoles, they don't have a strict breeding season. As long as the conditions remain good, they will breed all throughout the year. Green anoles, however, do have a fairly strict season - producing a relatively small number of offspring each year.