How did the invention of the model T Ford change the lives of Americans?

To understand the impact of the Model T, consider an invention that was once the exclusive purview of the few that is now so widespread and affordable that no one thinks twice about it. Now imagine an invention that radically altered the way you moved over a geographical area and fundamentally changed--forever--the way in which people thought about transportation. That was the impact of the Model T.
Henry Ford did not invent the automobile. What Ford did, however, was make it affordable for the masses. The Model T was introduced in 1908. Prior to the Model T, cars were something only the wealthy could afford. By utilizing the assembly line, standardizing parts, and making a relatively simple product, Ford drastically cut production costs and made the car into something that the average person could own. In fact, Ford was famously rumored to have said "You can have any color as long as its black." Black was the only color offered for 12 out of 19 years of the car’s production because it dried the fastest, meaning Ford could make more cars.
Think about what people used before the Model T. Again, cars were around, but they were expensive luxuries. Most people continued to use a horse and carriage. These came with expenses such as feed and land. What's more, not everyone could afford them, especially if they lived in congested cities. And large animals produce large amounts of waste which, combined with the poor sanitation of the age, made cities horribly polluted. (Although to be fair, the exhaust from cars wasn’t an improvement.)
With the advent of the Model T, whole industries changed overnight. Horses became less common on city streets, which drove horse-related industries out of business. However, new businesses opened, such as mechanics and service stations, to attend to the proliferation of cars. This was in addition to the tens of thousands of new jobs that came with the expansion of automotive factories, as Ford's competitors quickly began to follow suit and produce inexpensive cars.
Lastly, individuals suddenly had the ability to travel whenever and wherever they wanted. This truly was something new that humans had never experienced on such a broad scale. Prior to the widespread availability of the Model T, people's freedom of movement was largely curtailed to the immediate area in which they lived. After its development, that area increased dramatically.
So, when thinking about the Model T's impact, it's important to keep in mind not just the immediate effects, such as easily moving from A to B, but the compound effects that came with it. Some industries disappeared, others appeared and expanded. Further, we also can't overlook the impact it had on people's sense of space and time. An individual's radius of interaction expanded greatly and with it came a new sense of freedom of movement.
https://corporate.ford.com/history.html