You need both an electronic machine and a roller machine. Electronic machines such as the cricut cut various size images that can be manipulated, but need cartridges or digital images (connected to a computer) to work. They cannot emboss.
If you want to emboss, then you need a roller machine such as the cuttlebug or Big Shot. They work with embossing folders. They can also cut shapes using separate dies (such as Spellbinders) that come in fixed sizes. The electronic machines don't use these dies.
Most of the roller machines are manual, but if you have trouble with your hands, you may want to consider the Vagabond, which is electric. However, it's much larger and more expensive than the manual machines.