It contains links to a downloadable car list which gives you information on where to get all of the cars. In this case it tells you that there are three Toyota Aristo models - 3.0V '91, V300 '00, V300 Vertex '00 - which tells you that a 1991 or 2000 birthday ticket will give you a chance of obtaining one, and that they are levels 3, 4 and 4 respectively which tells you that a Level 3 or 4 ticket will give you a chance of obtaining one. It also tells you that they are available in the Used Car Dealership.
The sticky also contains links to the GTPlanet Used Car Database which tells you when they are available and how you can find out when they will become available for you.