You are responsible to return it in the condition it was when you took it, and you are responsible to reimburse for any expenses incurred. The car has a FasTrak, so you can use toll lanes and toll bridges, which I will initally pay, and I will also initially pay for supercharger fees, and then I will request reimbursement through Turo. If you reimburse me promptly there should be no surcharges.
There are fees for overstaying charge completion at a Supercharger, so be sure to note estimated completion time and move the car promptly. See https://www.tesla.com/support/supercharger-idle-fee for more details.
The car charges fast to about 85%, approximately 260 miles range, and then slows. Unless you expect charging will be scarce further along, it's often best to move along at that point. The car also charges slowly when charge is low, so it's best to find SuperCharging before it goes below 20%. I recommend a "charge early, charge often, take lots of short breaks" strategy. An attitude of "let's see if this vehicle can do its advertised range" results in *slower* overall trips. And range anxiety.
For battery longevity and rapid charging we try to keep the battery between 10 and 90% charged, or even better between 20 and 80%. If you are going to drive a long distance it's okay to charge to 100% just before you depart, but be aware that it will charge more slowly at the low or top end.