All puppies chew. They are usually quite content with a variety of safe chew toys like large Nylabones or Vermont Chewmen. Each dog is different but in general Swissies are not known as bad barkers. Swissies are quick to bark at anything new and different in their environment such as a car in the driveway or a delivery truck. They can also have a 'calling' bark where they will bark in order to get people to pay attention to them.
Swissy puppies can take a long time to housetrain.
It is not at all uncommon for it to take until the dog is 7-9 months old before being really house trained. Most puppies can be crate trained by 3-5 months and this will help in the overall process of house training. Swissies take a very long time to physically and mentally mature and as a result they can take longer to house train.