Sorry, does not appear possible to meet your specs. A typical car could hold enough solar panels for about 2 miles of range after 6 hours.1. Its has to be a 2 Seater
2. It should atleast run for 30-50 kms in one full charge.
4. The solar panel should charge the battery in a max time of 6hrs.
What specifications i need are,
What Motor to use( Kind and Specs)?
What Battery to use(Number,Kind and specs)?
What size of solar panel would be required.?
Try searching here for other solar threads, the topic has been pretty well discussed.
As for your specification questions, it will all depend on the vehicle you use as your donor.