Albino ferrets are the same as any other ferret. If your ferret is not as active as other ferrets, it may be an indication of illness or disease, and needs a checkup with the veterinarian.
there eyes are naturally black, unless it is an albino which would have pink eyes. Ferrets can see in black white gray and red. It is a matter of opinion if ferret eyes look scared.
Artificial turf would be OK to use in the ferret cage as long as it is washed with soapy water on regular basis and ferrets nails are trimmed. If ferrets nails start to catch on the turf, it should be removed right away.
Ferrets do not turn on people if properly cared for and socialized. An abused ferret would become a fear biter. A ferret that is sick or injured (as any other animal would) might bite.
A ferret's defense would be biting - as in being a fear biter.
I would suggest a harness that has snaps. If you have your ferret on a harness that has velcro, and no snaps or buckles, it is very easy for for your ferret to slip out of it. I would also not use a harness that is made specifically for ferrets, but if you want to you can, but for my ferrets I used a sorta generic harness for small critters.
They wouldn't fight, the ferret would simply kill the gerbil.
I would use products for ferrets only, dog products may be harmful for a ferret.
You can get Marshall bred ferrets from most Petco stores. You can identify a Marshall ferret by the two dots in the ear. This is a tattoo that identifies the ferret as fixed and descented. Marshall farms also breeds ferrets for lab research but Path Valley Farms does not. I would not recommend buying a Triple F ferret, they are being investigated for cruelty to animals.
Ferrets are predatory carnivores. In the wild, polecats (from which ferrets were domesticated from) would hunt and kill rabbits, and this instinct is not something that can be bred out of the species.
A ferret would win, housecats fight domestic ferrets a lot and the ferret usually drives the cat off. Cats have greater weaponry, skill and size but ferrets have greater speed, agility, mobility, ferocity, and strategy. No wonder they would win!
What makes dogs different from ferrets - everything is different between dogs and ferrets. Ferrets are not anything like dogs, there would be too much to list here. You need to read and learn about what a ferret is.
A domestic ferret does not have instincts to find food in the wild, they would starve to death. There are two other ferrets - European polecat ferret and black footed ferret. rephrase your question if your asking about one of them