Yes, there are plans to develop enough courses to cover all the major topics that would be part of a good university CS degree (although not always following the traditional structure of these courses), but it will be a while before more courses are launched.
The robotic car class is a separate class, so I'm not able to answer all the questions about that one. (I am pretty sure, though, we won't be able to actually send people physical robotic cars! There will be a simulated environment, but it will use real data.)
The point of the class isn't for people to build their own personal search engine to actually use, but to use the experience of building and understanding a search engine as a vehicle for introducing computer science and programming.