Bicycles (or e-bikes if you prefer) are far more efficient than cars for this purpose. Bike-share is also really helpful here, so you don't need to have your own personal bike.
Not if you have packages and such, you really need a cargo bike or something. Weather would also play a role. I don’t see bike share as very successful, but I guess with better security and places for the bikes to hangout it could work out better.
Bike-share works extremely well here in Tokyo. I see people on the red Docomo bikes every time I go almost anywhere.
For cargo, people generally pay for a delivery service if it's something too cumbersome to carry. In large cities like this, people don't buy a month's worth of groceries all at once; they only buy as much as they can carry.
