What is the ruling on the money, food, clothing, and gold that we save, and what is the ruling on eating food that the father brings as a gift? Is it permissible to wear clothes that the son is forced to take from some people, knowing that the father is an employee and receives money and in-kind gifts from some individuals at work?

Your father is not permitted to accept gifts due to his job, because they belong to the work, not to him. The evidence for this is the Prophet's (peace be upon him) saying: "Why don't you stay in the house of your father and mother and see whether you are given any gifts or not?" This is also because such gifts are a means to breach trust. Furthermore, "gifts to workers are defalcation (ghulul)." What he has acquired from these gifts is impermissible to benefit from, as it is illicit wealth. However, there is no harm in what you have saved from his salary. As for the clothes he forced you to take: if he bought them at their usual price, there is no harm; otherwise, do not wear them.