Inception Questions

How are building built in Limbo? Do you make them by hand (like shown in one of Dom’s flashback memories) or do they kind of just appear (like Ariadne’s practice dream in Paris)?

Can you die of old age in Limbo? If so, what happens?

Where are there no subconscious projections populating the shared dreams in the planning scenes?

How does the Internet work in dreams? Does it work?

Do phones and other similar tech work the same in dreams? Can phones be brought into dreams? How do they work?

How did Ariadne get into her first shared dream with Cobb without realizing it?

How does the team find their workshops/abandoned warehouses?

How did Miles, Mal’s father and Cobb’s father-in-law, get into dream-sharing? Was it through a government program?

How the fuck did Saito find out about Cobb’s kids and situation?

Is dream teleportation possible? Or are the dreamers bound by some laws of physics?

I assume it depends on the job, but Cobb and Arthur have sharp outfits, which must have cost a pretty penny.  So how much does being an extractor pay?

How long does it take a dream to collapse once the dreamer has left?