Hi @joehouse2016,
If you meet the criteria for temporary full expensing you can claim a deduction for the business portion of the cost.
The logbook is used to determine how much you use your car for business vs private. You complete this for a continuous 12 week period and the logbook can be valid for 5 years.
The costs for the car is exactly that and would usually tell you on the invoice from the dealer. Whether you financed the car or had a trade in those will still count as payments you made towards the cost of the vehicle.
You can claim running expenses. TFE is for depreciation.
Have you had a look at the information on our website where it talks about the log book method and eligibility for temporary full expensing?
There's some fantastic information that'll help you get it right.