Everything you say is accurate, except that the "T" ticket will be valid to go to Toledo, too. Places with touristic interest reachable with the "T" ticket are Chinchon, Aranjuez, Alcala de Henares, San Lorenzo de El Escorial, and Toledo.

The full list of fares is:
Days(Zone "A"/Zone "T")
1 (3.50/7.00 EUR)
2 (6.30/12.60 EUR)
3 (8.40/16.80 EUR)
5 (13.20/26.20 EUR)
7 (18.40/36.70 EUR)