The more light you can gather, the more you will see. The magnification of a telescope can be adjusted by using different eyepieces, much like changing lenses on a camera. So any telescope can be made to provide a wide range of magnifications. For general observing, low to moderate power is much more useful than high power. Most observing is done at magnifications of 50x to 150x.
Lower powers provide sharper, brighter images, too.
Never buy an astronomical telescope from a department store or TV shopping network. Department stores, discount stores, and TV shopping networks generally sell low quality telescopes at inflated prices. Images through such telescopes are nearly always fuzzy and disappointing. After using such telescopes a few times, many owners simply give up in dispair. The best place to buy a telescope for star gazing is from a dealer who specializes in astronomy.