Are you making an intro or do you want these views when the mission starts?
You can always start the mission in cargo of a vehicle.
In the your units init field type:
this moveindriver VEHICLENAME(this is driver seat)
this moveincargo VEHICLENAME(this is cargo seat)
this moveingunner VEHICLENAME (this is gunner seat)
where I have vehicle name put the name of the vehicle you want to start in. Don't put the things in parenthesis.
For binoc view look at Snypir's camera.sqs tutorial.
I am not sure about the sniper view. Hope this helped