being able to shoot action photos

Hi, I am a beginner to DSLR Cameras and would like a camera i can learn to use without much difficulty. However, i am interested in taking action photos and would benefit from faster auto focus. I don't think I will be making any new camera purchases for another 5 years seeing as I am a university student so I would a) like a camera that would last. b) be more suited to taking a variety of photo types e.g. action shots, landscape, portraits etc c) great quality images (e.g. megapixels, clarity with zoom and with lowlight conditions) d) one which would produce less 'noise' or more stable/better for taking pictures of moving subjects and in low light. e) Since the price of dslr cameras are pretty hefty for student budget, I would rather pay a little more now and have one which i could continue to use for years and one which is more flexible to add more features to e,g, variety different lenses, flash, microphone ... f) I would also like to take quality, clear videos with good audio and stability in full HD. thank you :)