How can i workout without weights until i can afford them?

Google "bodyweight" or "bodyweight exercises" and you'll get more hits than you'll ever use. Another great thing to do is go to a place called Movnat, also bodyweight, but also excellent for flexibility and what is called functional fitness.

You can't even afford weights? Jesus, you're poor. Should I set up a charity bin for you that we can throw extra cash in?

I would think that the old standards are still the best. Push ups, chin ups, sit ups, squat thrusts. Get some old tires from construction equipment and flip them around. Get an ax and cut up a lot of firewood. Get a 20 pound sledge hammer and make small rocks from big boulders. The options are endless.

Walk

Resistance bands. Jugs and bottles filled with water or sand.

I'd like to recommend a book called "Solitary Fitness" it's very very interesting.

In prison, a neo Nazi who was pretty ripped, took the sink off the wall, set it on top of the 5 gallon juice canister, filled it to the appropriate weight he wanted, took the mop head off and used the stick as handles by shoving it through the handles made on top of the juice container. It was actually pretty smart cause he could do some good curls and stuff with it. And it was free.

Another thing was jogging in place or doing a push up, jumping jack and sit-up one after another, 4 times, in 4 sets was good enough for me to feel it burn and then some.
What Ive also done is what I call the lizard walk, and its when you lay on your belly, then crawl on your finger tips and toes, like a lizard walk, stretching your arms and legs as far forward as you can. The same side, at the same time. Do it back and forth, I do that until I'm winded and can't do it anymore.

That, was a long, long time ago now. However it's all the same, may not be fancy but it was free and helped me pass the time.

I have also picked up bicycle touring. So now I'm doing at least 25 miles a day on my Surly long haul Trucker, and am preparing for my next tour in the spring to the British columbia.

Good luck to you.

End.

Use your own body weight. Push ups, Sit ups. Find a low hanging branch that will support you for pull ups. This seems way too obvious.

Good question. First thing to buy is a pull-bar. I use the "perfect multi-gym" cause it won't fuck up the trim and its portable. Milk and eggs are the best cheapest form of protein.