What's your goal then? Nobody asked you what you want to achieve so far...!
If you want to get lean and athletic, buy yourself a treadmill, position it in front of the TV and enjoy 2 hours of cardio every morning, combine that with calisthenics and you're rocking to go!
If you want to bulk up, get yourself a solid bench and go for bench pressing with barbells. All you need for this is short&wide barbells and a set of weights (you can find those used on craigslist for next to nothing). Plus you can train every single muscle in your body with those barbells.
The best piece of equipment to train efficiently is your brain! Consume knowledge and not supps.. (not saying supps are bad, just not as important as knowledge!) Go read on sites like Bodybuilding.com and t-nation.com and go from there!