You can do as said above, just make sure it's safe. Though you can frequently find used dumbbells and barbells with weights pretty cheap, if not free. people buy stuff for their new years resolutions, then stop using them after a couple months, and garage sale them, or donate them to second hand stores, good places to check if you're on a strict budget.
As for arm workouts, I use a combination of dumbbell and barbell workouts, better all around shape. Changing grip and angles make a difference.
Bodybuilding.com has some good workout articles for pretty much every part of the body, broken down to specific muscle groups. Here's the workouts directory page: http://www.bodybuilding.com/fun/bbmaintrain.htm
And here is the page for bicep workouts:http://www.bodybuilding.com/fun/bbinfo.php?page=Biceps
Some magazines also have good workouts in them, along with nutrition tips and other info, unfortunately they usually have a lot of ads to, which I just ignore. I subscribe to Muscle and Fitness, and also pickup a couple others from time to time if they have an article I want.
Remember to keep your body balanced, and your muscles in proportion with the rest of your body.
Good luck man, hope to see progress pics as you go.