It isn't quite as easy to master pronunciation of this language without audio tapes like you can learning a Latin-based language. Chinese is a character-based language, which makes it incredibly unique. There's a different character for every word. It isn't an alphabet-based language like most other languages are, so to read Chinese, you've got to be able to recognise a lot of words. To write Chinese, again, you employ your powers of memory and concentration.
Every word is different.
There is some semblance of a system, but there still exists a high entry barrier. About 3000 words should ensure you have fairly smooth conversation with speakers of the language. A good command of about 5000 words should allow you to read the daily newspapers. Yes, I'm a huge fan of languages. I've learned a touch of French, tried a bit of Tamil, and I'm now trying to teach myself Spanish.