No they don't need them cut.
Skateboard grip tape to the inside of their running wheel....
Yes by the concreat let them scrach
Not unless they are going to long if they r then use baby clippers but be very careful.. Another way is put sandpaper down on their wheel or something n it will get them down fast..
You wont really need to, but if you do, cut the nails with nail scissors, but don't cut the paw, there's a lot of blood.
Of course you need to cut their nails. All you people should be shot. A hamster is just like any other animal and needs to be cared for and groomed. You can take the hamster to a vet to have it done or you can do it yourself. It usually takes two people but YES YOU NEED TO.
Certainly not! There exists absolutely no need to cut a dwarf hamster nails. You can cut its nails when it has matured well in a physical aspect.