1. If you bought the land from him then it is your great mistake of not getting a deed of sale registered in your name. Now you can file a suit for specific performance of contract with alternative relief of easement.
2. No. Civil suit is only remedy.
3. No profit.
4. Yes. Both of you can file criminal cases against each other.
5. Yes.
6. Without seeing the notice its difficult to advise.
7. It depends how your advocate drafts the pleading.