Serious Situation - Serious Answers Only?

[2Honest]

I am now a single mother, after nine years. My partner cheated on me probably more than 3 times last year (2013) and once in (2014).
I found numerous "dating sites" in which he had made accounts with. On one specific site, he had posted pictures of his private parts and I had also noticed that there were personal pictures of my body, as well. He has never helped out with any finances what so ever, in the last 3 years. He is a huge drinker and a huge marijuana smoker. Constantly posting profound and sexual posts on Facebook. My concern is my daughter. Not because of him physically touching her, but because of what he might be doing in one room, while she is in another. (We have moved out) I know that my daughter and I, both deserve better.
I would just like to know what my "legal" options are. I only need answers from people who have been through something like this or actually know a thing or two about the "system" - "law". He can't get away with this! I gave him everything.