You don't, it has a chain.
it has timing chain
I don't think it has a cabin air filter.
First and foremost this engine does not have a timing belt. It acutally has a timing chain which does not need to be replaced unless there are issues with the vehicle holding time.
wires from the starter to the harness are touching
London
Nissan Altima
every 20-25000 miles
Depends on the size of the engine and what part you are using, but in most cases yes.
35mm - 40mm
Vvl swap
NOPE!!!
between 80 and 100,000 miles