I have poor WiFi here so do not know if this we said already.
FYI..... You can take your car down the Baja NO problem. No TIP required, or at least the last time I looked. BUT, if you want to take it past Km 21 or the hassle free zone on the mainland, you WILL need a TIP.
By the way, they have car ferries from Santa Roselia and La Paz that you can take your car across to the mainland (if you have a TIP) and back.
Greg