Best I can do is here: Arabic is Morocco's official language (it is the "classical" Arabic of the Qur'an, literature and news media). The country has a distinctive dialect known as Moroccan-Arabic. Approximately 15 million Moroccans speak Berber --which exists in Morocco in three different dialects (Tarifit, Tashelhit, and Tamazight)--either as a first language or bilingually with the spoken Arabic dialect. French, which remains Morocco's unofficial third language, is taught universally and still serves as Morocco's primary language of commerce and economics; it also is widely used in education and government. Morocco is a member of La Francophonie. Amazigh (Berber) activists have struggled for half a century for the recognition of their language as the official language of Morocco in the Moroccan constitution. They also demand that this language is taught in all Moroccan schools. About 20,000 Moroccans in the northern part of the country speak Spanish. English, while still far behind French and Spanish in terms of number of speakers, is rapidly becoming the foreign language of choice among educated youth. As a result of national education reforms entering into force in late 2002, English will be taught in all public schools from the fourth year on. Source: http://en.wikipedia.org/wiki/Demographics_of_Morocco

Yes, Moroccan people understand all dialects of Arabic as to other Middle Eastern people do not understand Moroccan dialect.

Yes the only thing is the dialogue may be different stress not all Arabic sounds the same.

Yes you will probably be understood although like most places dialects and accents are different. a lot of people in Morocco speak French and quite a few Spanish.

I agree that, for the most part, the point of what is being said will be understood. There may be some specific words that are unique to a dialect. These are usually "new" words (things having to do with technology for example might be slightly different).

I agree with the top answer and just want to add that Egyptian Arabic is understood all over the Arab world even if they do not speak it.