If you have water running out of the toilet and it's not flushing, then you may be worried about what you are going to do about it now, and what you can do about it in the future.
Snake the Toilet
One way to handle your clogged toilet with the overflowing bowl is to use a snake. These are also sometimes called toilet augers. The end of the snake has a little claw. You snake that part down into the toilet. Then using the screw handle at the top, you start screwing the extendable end of the auger down into the drain so that the claw can get into the clog. The claw should be able to work it's way into the clog and the screwing motion should break it up so that the clog can be flushed down easily. When you think that you have broken the clog up, pull the auger back out of the drain and use your plunger a few times. If the water in the bowl goes down, then try to flush it again. If the water doesn't go down after you try plunging it, try using your snake again. Do not flush unless water is going down the drain.
Prevent Future Clogs
There are several ways that you can prevent future clogs. If you have someone who likes to use an excess of toilet paper, that can cause you to end up with a huge clog in your pipes. There are a couple of things that you can do about that. One is that you get different toilet paper. If you get the fancy double-ply, cushy, quilted stuff, it may be nice to use, but it doesn't break down as fast as the single-ply not as fancy stuff. You may also ask that particular person to plunge the toilet after they flush, every time they use a large amount of toilet paper. Plunging after they flush will help push the toilet paper down further in the pipes than just flushing alone will, and will help to keep it from all collecting together.
If you have tried snaking and plunging and nothing has worked, you may think that you are going to be stuck with a clogged toilet. However, that's when it's time for you to call a plumber. They will be able to do things that you can't and will hopefully let you be able to flush your toilet.
Contact your local plumbing services for more information and assistance.