The question

I need to know the steps of filing a civil lawsuit on my ex fiancé. He stole my vehicle that I had towed to the dealerships to get new tires&checkup done. I spoke to the T-truck company that afternoon and they confirmed it's safely at the dealership. I called the dealership the following day and they never had anything in their system of my car ever being there. TowTruck company lied at First later on advised me of my car being left in the back lot with the key fob inside the car&the "co-owner"picked it up He did not pay for that car never put any money into it. I was in the middle of moving out of my girlfriends house in Naples so all my belongings were packed inside my car. My wallet with my DL debit card&cash along with wardrobe etc. I lost my job due to not having the supplies/products i was responsible for&inability to make it to work on time. My car and the contents inside of it is everything i own my ex fiancé is a millionaire&has no reason other than being malicious