What should I do about my brother who refuses to register my name as a partner in the ownership of the house we share, and is my priority to go on Hajj or buy an apartment for my family?

Kinfolk should strive for harmony, and when disagreements arise, they should gently engage in dialogue. They may seek the help of virtuous individuals. If reconciliation is not achieved, there is no harm in resorting to civil courts, bearing in mind that a judge's ruling does not make lawful what is unlawful, nor does it make unlawful what is lawful. As for which takes precedence, Hajj or buying a house, there is a detailed explanation in Fatwa no. 25063.