Does Nikon d5100 has same sensor as d7000?

Please suggest me the best camera…

Also suggest me the best lense.

Yes. 23.6 x 15.6mm CMOS 16.2 MP Sensor.
Note that the D5100 does not have a screwdriver so it will ONLY focus AF-S lenses.

The best lens is probably the 24-70mm f/2.8. The pictures from it are outstanding.

(The best lens for you will depend on what you want to take pictures of.)

The Nikon D5100 has the same sensor from the D7000 with 16.2 megapixels. There's no such thing as the best camera and the best lens. Just get what your budget allow you and explore with it.

Both cameras have the same sensor (CMOS 16.2MP). Which one is better is actually a matter of opinion (or needs).

I'd say the D5100 is targeted more towards HD video enthusiasts and beginners while the D7000 is targeted more towards semi-professionals and advanced amateurs.

The D7000 has build quality that is on par with it's bigger brother, the D300s as well as many more professional features such as faster FPS shooting, more autofocus points, a more advanced metering system, and twin SD cards.

The vari-angle LCD screen of the Nikon D5100 is much better for shooting videos and for discreet street photography. Additionally, the LCD screen can really come in handy when shooting difficult angles.

I have the D7000 and I'm really happy with it but I don't like shooting video with a DLSR (same way I would't use a fork at McDonalds. My step brother is however very happy shooting movies with his (although he got Canon).

Bottom line, either way you can't go wrong, it's more about your likings and off course budget.

PS: about lenses, default lenses are more than enough for starters. If you need a different one, it'd depend on what use are you thinking of

Yes, It has a 16.2 megapixel sensor, same as the D7000.

You can wait for the D5100 as the price should be lower than the Nikon D7000, and as we all know. It has the same sensor.