You need to finish those books to understand the advice you'll be given. You need to focus on yourself.

As for the car, can you afford all payments by yourself: loan, insurance, registration, servicing, etc? Would you be comfortable financially if you lived by yourself with a new car?

Me: 31, W: 29
T: 4 M: 2
Kids: 3 (SS: 7, SD: 4, D: 3)
Separated, still living together: Nov 2013
Separate bedrooms: Feb 2014
W working away; kids with me: Nov 2014