Is it possible to trasfer apps and setup from my second generation apple tv 4k to the newest apple tv 4k 3rd generation 128 gb?

You will still need to install the apps and sign in to everything. You can match the Home Screen set up:

f you have more than one Apple TV associated with the same Apple ID, you can keep the same appearance and apps for each device. This makes it seamless to switch between an Apple TV in the bedroom and one in the living room, for example. 

1. Open Settings  on Apple TV.
2. Go to Users and Accounts > [default user account name] and turn on One Home Screen.

Customize the Apple TV Home Screen

Mine asked if it should and when i said yes it did so from my appletv hd to my appletv 4K 2se