Tow truck driver said it is probably the starter

Is the security light flashing? If not then I would say it is the starter but to be sure we must test for power at the trigger wire (small) of the starter.

You will need to raise the car up to do it.

Here are a couple of guides to get us started:

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check toward the bottom of the guide.

https://www.2carpros.com/articles/car-cranks-but-wont-start

If the starter is bad here is a guide that will give you an idea on what it will take to change it out:

https://www.2carpros.com/articles/how-to-replace-a-starter-motor

I would use an AC Delco unit they are a little more expensive but worth it. (diagrams below)

Please let us know what you find.

Cheers, Ken