It is obligatory to communicate with the father, even by the least ways of communicating, like talking to him over the phone or seeing him in main events. However, if one has a rational fear that even communicating with him in this minimal manner would cause him harm, then it is not obligatory.
Reciting the Quran in its original Arabic is essential in the prayers, and it must be learnt if you do not know how to. Outside of the prayer, reciting the Quran – in its original Arabic – is a recommended deed and not obligatory.
If the said property is used by a person without paying its due rent then he is considered as a ghasib (usurper) and the prayer in such a place - if he is attentive of the fact that it is prohibited - is void.