To the best knowledge, there are an infinite number of galaxies, which means they don't have names!
Around 42 named galaxies, with 13 possible additions. See related question.
We don't actually know - because we cannot see the universe beyond a certain point due to the fact that we are in it. We have named the cluster of galaxies we are in the Virgo Cluster but there are many other clusters and lone galaxies as well. So we'll probably never know that answer!
Scientists estimate there are at least a billion galaxies. Answering the question specifically, NASA'S Extragalactic Database has named over 4 million galaxies using redshift calculations.
Galaxy clusters typically have anywhere from 50 to 1,000 galaxies.
Approximately 60% of all galaxies are spiral
Both have a huge black hole at their center.
It's not known to any degree of accuracy, but about 66% of all spiral galaxies are barred and about 60% of galaxies in the local Universe are spiral galaxies.
The mars bar. the milky way. starburst. those are as many i could think of at the top of my head :) mars bar isn't choco but its candy...
Edwin Hubble, in the 1920s. Later they named a telescope after him.
Not just dwarf galaxies. Giant elliptical galaxies lie likely the result of many galaxies, small and large, merging.
Yes, many galaxies have supermassive black holes at their centers.
All of them