Hey Gulhazara your problem is easy to solve.
First go to the top menu bar and select "Rendering" then select "Render..." (Picture 1). When the menu box comes up go to "Common" then notice that the top section is called "Time Output". Currently the option for "Single" will be selected, which means that a single frame (Like a Photo) will be rendered. Simply select "Range" and insert the frame numbers you wish to render out (Picture 2). The first box to the right is the starting frame that you wish to render and the one to the right of that is the finishing frame. These will default at 0 and 100 and if you have not changed the amount of frames you have in your scene then you will not need to change these numbers.
If you need anymore help just start a new thread of your own in the forums, if its about 3ds Max again then just use the "Software Specific" and "3d Studio Max" sections and im sure you will get all the help you need
Cheers