yes, sales tax will depend on whether or not you actually live in Texas. If you do not and have no plans on registering the car in TX, then no sales tax. If you live here, but are keeping your CA residency, then yes, you will have to pay the tax.
Texas, the state of your residency
No. You need to buy auto insurance in the state in which you're legally resident.
Yes
take the car to Texas and register it there
Texas.
For it to happen in your dreams. You must be a resident of the state you're registering your car in.
Drive it
Only if you're a Florida resident.
Noooooooooooooooooooooooo!!!!!!!!!!
If you wanted to traavel by car from Texas to California using the shortest route, you would pass New Mexico and Arizona.From Texas to New Mexico, Arizona and then California.
Yes, you would pay California tax if you bring the car into the state within a year of having purchased it anywhere else.