Clothes: Either hand-me-downs or from the free pile in Salvation Army.
Soap, toothpaste, etc: I don't use most of this stuff.
Travel: I do pay for changing places occasionally. Most of the time I look/wait/pray for someone driving the same way I'm going and riding with them. If it's a bus or a train, it is paid for by people who support my work. (I write foss.) I don't use airplanes anymore.
Food: Various sources. On this one, I am a bit of a spiritualist, so I generally wait for acceptable food to appear before me or be given to me and only then eat it. (If someone offers to buy me something, I generally refuse.) I believe in the benefit of fasting, so I fast until acceptable food appears, but I rarely fast unintentionally. You may not realize how much abundance we live in, but by some estimates 40-50% of food produced for our society is discarded in the trash (many "composting bins" are complete bullshit and go directly into the same trash pipeline as the regular trash). So finding some extra food without pulling it out of the supply chain via payment is not that hard.
If you want a good primer on this stuff, look for a book called "The Man Who Gave Up Money", it does a pretty good job of explaining. A free copy should not be too difficult to find online.