Ten months to a year when they start meeting size regularity
dachshund
Better if the female is the regular dachshund; the puppy may be too large. Check in with your veterinarian.
All puppies may drool when teething.
It depends on how old you puppy is. If he is a newborn, you shouldn't be feeding him puppy food right away. If your puppy is a little older, I would begin by soaking it in lukewarm water. This will make it softer and easier to chew. If your Dachshund is older an should be at the hard kibble stage, I suggest putting treats or gravy in - this will tempt him to eat it.
NO, because the dachshund's skin is still sensitive wait tell at least 3 more weeks at the most. There skin is still trying to get used to the weather that is going on even though the Dachshund is 4 weeks old.
When a puppy licks you, that's considered a puppy kiss.
no, not really they may be but the majority of them are easy to train very good house dog or puppy.
There is no reason why not, just make sure that the introduction goes well be introducing the two dogs to each other in neutral territory, such as a local park.
Dachshunds have webbed paws so that would make sense.
Genetically yes, practically it is unlikely.
As long as the pups have teeth they can start on puppy food
The dog referred to as "Goober" in the Netflix: "The WrightNows" commercial is a Dachshund Chihuahua Mix.