You can't apply for just sleeper attendant. You will be applying for Train Attendant, which means you will be working both Coach and Sleeping Cars ( as well as working as waiter in Dining Car in some Crew Bases) until you have enough time to hold a regular Sleeper position. You will be away from...
Meals are included with any type of sleeper including upper/lower berths. Everyone enjoys the same meals in same dining car.
All accommodations have access to the Park car, With Prestige Class having slightly better options, but otherwise all equal.
To avoid total snow, maybe end of...
You are correct. Most issues like this, reported to management, get an eye roll and then the report goes in the trash. Rarely, usually if a tree in corporate was rattled, will it even be mentioned to the employee.
In order to officially have your own car, you need to purchase a minimum number of tickets, and will also depend upon origin/destination.
The group department can give you more details.