Will the subject options be available, and, when can I specify them in my order?
No one knows what the final options will be or what they're going to cost. As for when yo ucan specify them in your order that will depend on when you get to configure your car, which will be based on a number of different factors like when your reserved, where you live, if you're a prior owner, and if you're an employee. There are numerous dicussions of when people will get to configure, you can google one of those and read all of the various theories.
With all of that being said, Elon did confirm that there will be a performance option, although no mention of battery pack sizes has been made yet. It was confirmed that one of the roof options will be a panoramic roof which, if it is like the MS, will include a power sun roof. Tinted windows I don't think have been mentioned.