You can find useful details in the Bike wanted page

Yes. One person per team may travel to work without a bike by using their own body power (e.g. on foot, skateboard, skaters, etc.). You may combine this journey also with train and/or public transport if at least 10 minutes of the trip is done by walking (or skating, skateboarding…).

Yes. You can use an e-bike during the Bike To Work event.

Yes. Combination with train or public transport are allowed.

You can find useful details in the Path Finders page.

You can find useful details in the Be safe!​​ page

Yes. You should consider to combine your travel with bike and train and/or public transport. The only condition is that you use your bicycle for a part of your commuting. No minimum distance for the bike part is required.
Find more details in the Bike in Public Transports page