I think the webpage you mentioned is a very good place to start learning these stuff. It says that you can use the Simple Past tense when you are talking about:
- Completed Action in the Past
- A Series of Completed Actions
- Duration in Past
- Habits in the Past
- Past Facts or Generalizations
So, you see a simple past sentence: He played the violin. The sentence can mean many things depending on the context. For example :
- At yesterday's concert, he played the violin.(USE 1/USE 3)
- He once played violin. Now, he usually plays piano.(USE 4)
If you just say He played the violin then it's unclear. There are many words that you can use to indicate that you are talking about a habit such as: always, often, usually, never, when I was a child, when I was younger, whenever, wherever, etc.
Now, let's come to your question.
(A) When I go to your home every day and see your door was locked.
The tense is wrong as many have already mentioned. go and see in in the present while was locked is in the past. So I will try to write it this way:
(A.0) When I came to your home every day, I saw that your door was locked.
Which sounds quite awkward. I think we don't use every day and when like this.
(A.1) When I came to your home, I saw that your door was locked.
(A.2) Every day, when I came to your home, I saw that your door was locked.
(A.3) Every day I came to your home, I saw that your door was locked.
(A.4) Whenever I came to your home, I saw that your door was locked.
Without any context, (A.1) sounds like one completed action in the past rather than a habit. (A.2), (A.3), and (A.4) sounds fine for me.
(B) In his container he carried chemical to destroy it in water.
I think it's better to say He carried chemicals in his container to dump it in water.
I think the word chemical is better in plural in this context(though I don't know why) and well, we can't destroy chemicals. We can destroy chemical weapons but not chemicals.
Also, prepositional phrase often comes right after what it describes. "In his container he carried chemicals..." might be interpreted as "He is in his container" which doesn't make any sense.
(B.1) He carried chemicals in his container to dump it in water.
(B.2) He often carried chemicals in his container to dump it in water.
(B.3) He used to carry chemicals in his container to dump it in water.
Without any context, (B.1) sounds like one completed action in the past rather than a habit. (B.2) and (B.3) sounds fine for me.
(C) When there were no races, the animals were rented out for weddings and other functions.
This one is fine.