people is a plural noun always preceded by many, and never by much: There are too many people. information, luggage (or baggage), and equipment are uncountable nouns and therefore are always singular: How much luggage did you bring? or How many bags did you bring?
What is a singular of luggage?
Luggage is a collective noun= a singular noun that denotes a group of individuals or things. You will not be able to tell without a context whether the reference is to one case or more than one case. That luggage is hers – she only has one suitcase/she has three suitcases.
Is there a word like luggages?
In this page you can discover 19 synonyms, antonyms, idiomatic expressions, and related words for luggage, like: baggage, bags, gear, traps, truck, valise, trunks, valises, suitcase, rucksack and carry on.