First off, we have how everyone gets around walking. It's the easiest built in thing to do, just get up and go. But that's if everything is close to where your living. I live in a suburb and everything pretty close. Shopping is not bad I came across a little shopping cart I got for free from a yard sale. My knee is not bad for short walks as long as I have my cane. I'm good to go.
Second, what if everything is not close. The metro buses are really good. You can get a monthly pass for a good rate. Think of it this way your not paying for insurance or gas. The price of a monthly pass is comparable to having to pay for the necessities of a car.
Third, we have light rail. I just started riding the train. I love it. The price is not bad and it gets you pretty close to where your going.
Fourth, if your disabled their are services available. Para transit and Dial-a-ride are available. Dial-a-Ride is pretty pricey in my area $4 each way. I'm not sure about para transit but they pick you up at your door and take you to where you have to go and then come and get you when your done.
Fifth, theirs the zip car. I came across this on an Internet Search. You can rent a car for a couple of hours. You don't have to have it all day. Just for the amount of time you need it. Something to check into if you already have your license.
Sixth, if your a veteran their are services available. If you have appointments at the VA hospital they offer a car service. You just need to check with your VA hospital and see if they have it available. They take you to your VA hospital appointments. I like it I don't have to ride the train or the bus.