You can't remove the old wheel without a jack. The spare is probably right next to it.

• The spare tire is usually located in the wheelwell, which is often on the bottom of the side of the car. It's either an indented area or a slot of some kind where the jack is meant to reside. Your owner's manual has a diagram that will locate it for you.
• Most often, the spare will be held in place by a bracket or a bolt that unscrews by hand pretty easily.
• If the jack is located in metal slots, slide it out and make sure that the handle is there as well. Many jack handles double as the lug remover, but if you have a real lug wrench (see above), you won't need to use it as such.