I think you are getting GLI AT.
Answers to your questions
2. Using Yoko advan DB, quite satisfied with it's soft and noise less ride.
3. Haven't installed yet.
4. Same key as installed by Toyota is available within 2k, got mine altis type key from Toyota for 4k with Toyota logo on key. You can even get same key with added feature of beep and auto lock feature in 3k from open market.
5. I've got OK LOCK which locks gear and hand break, I've posted it's pic in back pages, you can even Google it to see, a very good lock, easy to use.
If you are fond of infotainment, try to get Grande used system, I've got mine from open market and enjoying it's quality at very reasonable price.