What are you going to do for your home this weekend?

1. I am going to clean the windows this weekend.

2. I am going to clean the floor with a mop.

3. I am going to mop the floor.

4. I am going to vacuum the living room.

5. I am going to clean the living room with a vacuum cleaner.

6. I am going to paint the walls with Father.

7. I am going to arrange the things in the veranda.

8. I am going to fix the computer.

9. I am going to clean and arrange my room.

10. I am going to carry garbage to the garbage can near the janitor's office and throw it into the garbage can.

11. I am going to take care of my little brother.

12. I am going to help my brother with math.

13. I am going to wash my little brother in the bathroom.

(Would you check the expressions above and correct some errors?)

6. Do you mix father up with turpentine before you paint?

Perhaps:
Father and I are going to paint the walls.

10. Does the janitor's office fit in the garbage can?
Perhaps:
I am going to throw garbage into the garbage can near the janitor's office.

The expressions you provided are mostly correct, but I can clarify and make a few corrections:

1. I am going to clean the windows this weekend. - This expression is correct.

2. I am going to clean the floor with a mop. - This expression is correct.

3. I am going to mop the floor. - This expression is correct. It is similar to the previous one, but more concise.

4. I am going to vacuum the living room. - This expression is correct.

5. I am going to clean the living room with a vacuum cleaner. - This expression is correct. It is similar to the previous one, but more descriptive.

6. I am going to paint the walls with Father. - This expression is unclear. Did you mean you will be painting the walls together with your father? If so, you can say, "I am going to paint the walls with my father."

7. I am going to arrange the things in the veranda. - This expression is correct.

8. I am going to fix the computer. - This expression is correct.

9. I am going to clean and arrange my room. - This expression is correct.

10. I am going to carry garbage to the garbage can near the janitor's office and throw it into the garbage can. - This expression is correct, but it can be simplified. You can say, "I am going to carry the garbage to the can near the janitor's office and throw it away."

11. I am going to take care of my little brother. - This expression is correct.

12. I am going to help my brother with math. - This expression is correct.

13. I am going to wash my little brother in the bathroom. - This expression is correct, but it may sound better to say, "I am going to give my little brother a bath in the bathroom."

Overall, the expressions are clear, and by following them, you will be able to properly describe what you plan to do for your home this weekend.