The phrase 'too much' is commonly used to indicate that something is in excess or more than what is necessary. The word 'too' is an adverb that means 'in excess' or 'more than necessary', while 'much' is a quantifier that means 'a large amount'. When you combine them, 'too much' means 'more than is desirable or necessary'. It can be modified by other words to express different degrees of excess. For example, 'way too much', 'a little too much', 'almost too much', 'just too much', etc. For example:

'To much' is a common spelling mistake that learners and even native speakers tend to make when confusing the preposition 'to' with the adverb 'too'. It's important to avoid using 'to' instead of 'too' in this context.

'To' can either be a preposition of direction and movement which appears before noun phrases to form a prepositional phrase, or a particle that appears before bare infinitives to form a 'to-infinitive'. Accordingly, 'to' cannot appear before 'much' to form a meaningful phrase.