Grammar

1. Too Many

1.1. We use many with plural nouns

1.2. Before articles we have to use "of"

1.2.1. Examples

1.2.1.1. There are too many dogs in this town.

1.2.1.2. There are too many cups

1.3. Countable things

2. Too much

2.1. We use much with singular uncountable nouns

2.2. Before articles we have to use "of"

2.2.1. Examples

2.2.1.1. This winter, there is much snow.

2.2.1.2. This work took me much of my time.

2.3. Use -there is in affirmative sentences