Is it permissible to purchase home furnishings in installments through a bank with interest, an insurance percentage, and a deduction from the salary, and is it permissible to receive the amount in cash from the financier instead of the furnishings?

The transaction mentioned in the question is an explicit usurious contract that is impermissible to undertake, because it is a loan with interest. It has been authentically narrated from the Prophet, peace and blessings be upon him, that he said: "Allah has cursed the one who consumes usury, the one who feeds it, its scribe, and its two witnesses." There is no difference between taking equipment or cash with interest; all of it is forbidden usury. Usury obliterates the blessing of sustenance, for Allah the Almighty says: "Allah destroys interest and gives increase for charities."