Keeping a non-mahram as a Facebook friend and conveying salaam to non-mahrams

Q: 

Can I keep a non mahram as a Facebook friend? If I don't talk with them unnecessarily & don't post any photo of mine? Will it be considered as zina for me? Can I give likes to the posts of non mahrams or will it be considered as zina? 

Can I give salam to my non mahram relatives? Will it be considered as zina?

Revoking the talaaq

Q: If a person asked a mufti that I used the pashto word "zan talaq" to my wife 2 times like to her hands etc. Does divorce confirm by this asking? 

If a husband calls his wife hand as zan talaq, what does it mean while the husband doesn't intend for divorce?

Making taubah for one's past

Q: I have committed a lot of sins to the point where my life is on the line. 

I heard a talk about if someone doesn't have enough good deeds to account for their bad deeds Allah takes it for their state like: making them lonely, taking away their salaah and imaan, etc. I am kinda in that state and I want to repent and make tawbah but I don't know how. 

What dua do I make? Do I pray salaah like normal? Do I read specific durood? Are their specific steps? Do I need to make ghusal? What do I do? 

Please give me a LOT of advice on how to repent and strengthen my imaan (e.g. duas ,extra prayers, etc.)

Watching movies and drama shows

Q: I would like to ask if it is permissible to watch dramas like Yunus Emre or Kurlus Osman or any other Turkish dramas which are not inappropriate during the time when I have menses or any other free time. If not, are there any other halal ways of entertainment other then spending time with family?