How to reduce transport cost and pay off debt?

You can walk.
You can commute by public transport
You can ride a bicycle

How much do you owe on your pdls? Are they legal?

Do you have cars? If you have more than 1 cars which are in good condition, then sell them. By doing this, you can get a good amount money. You can also rent the garage.

But these all depend whether or not there is enough transportation in your area.

However, if the problem is the PDLs, then find out whether or not they are legal in your state. If illegal, then just pay the principal amount that you owe.

You can go together with your family members and ride 1 car instead of using multiple cars. This helps save a good amount. Moreover, check out when gasoline price is more - Avoid those dates.

Have you ever tried the car pool option? I think you can give it a try.
Also, If you need a car to get around but won't drive it every day, consider renting or signing up for a car share network. By this way you can avoid maintenance and repair costs.