I don't understand how you get downvoted so much. Right now tomatoes are in season and are like 1.39€ per kg. Within a walking distance of 15 minutes I have about 5 supermarkets.
If you have a lot of free time and don't calculate labor costs for this time and you have an acre at your hand like someone's poor grandparents in the other comments, like, ok, feel free to plant tomatoes. (Actually, feel free to plant tomatoes even if you don't.) Minimum wage is about 12€ here. Seeds, soil, buckets (not sure of the English term) also cost money. I only got a balcony, with limited sun exposure too. Like, I still decided to try and grow some crap this year, but it is definitely not worth it moneywise.
I got a kid but not a car. Just walking to the kindergarten and back twice a day is movement. We spend a lot of time outdoors at playgrounds or parks and I have to do all the grocery shopping by bike or walking. I don't do other physical exercise admittedly, but this kid is a fitness machine. We be running, playing, I need to lift her, carry her, carry her stuff, clean up, wrestle - for real having a kid made me the most physically fit and active I've ever been.
When I was younger I liked to dance. Trying to lose weight I'd just put headphones on in my room and dance for hours. A friend of mine actually lost a crapton of weight this way, think obese to normal weight.
Also, making a kid (and training for it and reenacting it) is great exercise.