Nikon D70 burst mode and shutter speed?

I've just bought Nikon d70 camera and to tell the truth i'm still trying to figure out how things work with it. The problem i came up with is burst mode, when i'm using that mode it takes only 3 shots and the shutter speed is really slow (what's the use for burst mode if the moving object will be blurry) also, if i manually choose high shutter speed, the higher i set it darker the picture gets and at last with 1/8000 image is just BLACK (even without burst mode) so please help me figure it out, what is the best settings for burst mode and how can i take pictures with faster shutter speed without making it dark.

The flash burst mode is to counteract red eye when taking pictures of people. When taking pictures in low light you can change the aperture to allow more light in but with a slow shutter speed you should use a tripod to hold the camera still. You can sometimes take low light shots without a tripod if you stabilize your camera on a stationary place and use a lens with an image stabilizer on it.

Until you are familiar with your camera try taking your picture in auto night mode and look at what your camera settings are when the camera does it, it will give you an idea of where to set it in manual most for best results. It will be a starting point for you.

You really need to find a beginners guide to SLR/DSLR photography.

In DSLR terms your D70 is ancient, that's the reason it's burst mode is so slow.

The shutter speed is a different issue though. You have to understand that while your DSLR is more powerful than any previous camera you may have owned, you have to understand how it works, and realize that it can't work miracles. If you just increase the shutter speed and do nothing else then with every increase your images will get darker. The shorter the time the shutter is open the less light will reach the sensor. For now I'd suggest you select the program mode; this mode will allow you to change the ratio of shutter speed to aperture while keeping the exposure within bounds.

When you've got the hang of your camera a little more you may at that point find it useful to buy a "brighter" lens, which is one that has a larger aperture.

*Your next step, buy that guide book, or go on a course!