if you have no weights, find some big stones and tires, etc. have some fun.
may i ask how old you are and what your situation is? i cant go to a gym for various reasons so i bought myself a bar with 345 pounds of plates, a set of adjustable dumbbells, a bench, and i'm getting a squat rack for christmas. this was all relatively cheap, i could afford it with doing a couple odd jobs for strangers and saving the money..