The best way to start learning about becoming a NASCAR Mechanic is by contacting some of the teams that manage cars. They would let you know what path you should take to eventually becoming one of their mechanics and what you should focus on.
yes
No, they do not. Manual transmissions are used in Nascar race cars.
It seems highly unlikely that Nascar will ever race strictly stock cars again.
Yes they can. Any race or gender can participate in Nascar racing.
The Nascar Cup Series fields 43 drivers at every race they go to on the schedule.
Talladega
43 cars race in each Nascar Sprint Cup race. The numbers change on how many enter.
No, they do not.
Depends on the race, during NASCAR events the NASCAR stock cars race, during the 24 hours at Daytona event different sports cars race.
Chevy Volt
43 drivers are in one Nascar Sprint Cup Series race.
Their are several cars that don't qualify for a race because they where to slow. Only 43 race cars can be allowed to race so its not over crowded on the race track.