1) We have two houses, 1 on my name and another on my husband’s name.
In 1 of them, my parents live and another house is rented and we have taken 1 house on rent so we take rent from there and give it to the 1 in which we live so basically we live in rented flat we get money from our own house then we add more amount and pay for our rented flat. So on this we have to pay zakat or khums or not?

2) I have gold more then 7 tola. Most of the gold is with me and remaining is in locker on this we have to pay zakat or khum? If yes then how much we have to pay on how much tola and percentage?

3) We have kept some amount in bank 3 months back which we have taken on loan and still paying loan so on this we have to pay anything zakat or khums?

4) As I mentioned in my question 3 that we have taken loan from which some amount is in bank and some we have given someone for his business so he will give us profit inshallah but yet we have not get any profit or the actul amount which we have invested so on this we have to pay any zakat or khums?

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1- If your parents live in the house in your name, and they cannot provide their own housing, and you are the one who take care of them, then the khums is not required in this house.
As for the other house, which is in the name of your husband, if in reality it is greater than your need, so he rented it and lived in an apartment, then a fifth is required in the amount of discrepancy between your need and the excess.
And if he is not like that, but he rents it and rents an apartment for a specific interest, then the khums is not obligatory on him.

2- If it is shaped gold, and you used it in the year of purchase, and you have been using it for a while, then there is no khums in it. And if it is a piece like a pound and a lira, then it must be one-fifth, which is 20% of it, and one-fifth of the seven is 1.4-tula, then you can sell this amount, and take out the value as one-fifth, and if you do not want to sell, and you wanted to pay the khums from an amount that has not completed a year in hand, then you have to pay a quarter.
Hence, If the value of 1.4 tola is 1,000 dollars, for example, and one fifth of it is 200 dollars, then you have to pay 250 dollars.

3- You have to pay the khums for the amount you settled.

4- If you gave him the money as a loan, and you stipulated that he return it with interest, then it is a forbidden usurious loan, and it makes you cursed with God Almighty, and it is not permissible for you to take interest.
But if you gave him money for investment, then you have to pay one fifth of what was paid to the bank, as I explained earlier in 3.