Peppy,
Welcome to the wild world of linguistics! To start answering your questions, I’ll explain what English is.
English is a Germanic language, related to German, Dutch, and, more distantly, the Scandinavian languages like Swedish, Danish, and Norwegian. The proto-form of English was carried to England by the Angles and the Saxons, German tribes who invaded the British Isles and rousted the native Celts. The Anglo-Saxons had it good for a few centuries until the Norman Conquest, when the French-speaking army of William the Conqueror arrived from Normandy, France and took over the country.
Over many centuries, English absorbed a great deal of the French vocabulary, which is why if you look at a French newspaper you can pick out words and sometimes even get the gist of a sentence. Greek and Latin were prestigious languages in the medieval age and over time many of their words filtered into English as well. Its structure is still Germanic, however, as is the bulk of its vocabulary.
As England rose to prominence, English was carried to every corner of the globe. It picked up what are called loan-words from many different languages, including Spanish, Hindi, Arabic, Quechua, and many others. Hence we find alcohol (Arabic), shampoo (Hindi), tornado (Spanish), and llama (Quechua), among many other loan-words in the English language.
English is, as I said before, part of the Germanic family of languages, which is itself part of the Indo-European family of languages. There are many other branches in I-E, including the Romance languages (Latin, French, Spanish, etc.), the Slavic languages (Russian, etc.), and the Indian languages (Hindi, Punjabi, etc.). All of these languages derive from Proto-Indo-European, which was spoken about 2500 B.C.
You might want to check out the sci.lang. FAQ for answers to some other common questions about linguistics.
.:Nichol:.