Learn English – “First thing I did” vs “First thing I have done”

"Have you got a chance to X?" asks if the person has a chance to do something. E.g. "Have you got a chance to win the lottery?"

It essentially implies that being able to do something is mostly out of your control.

Asking "Have you got a chance to look into this?" would imply that "looking into this" is something that one is unlikely to do with out a lot of luck.

"Did you get a chance to X?" ask if the person has had time to do X. E.g. "Did you get a chance to go to the shop?"

It essentially implies that being able to do something is mostly constrained by other things in your schedule.

Asking "Did you get a chance to look into this?" would imply that "looking into this" is something that must compete with other things one must do to become a high enough priority to be done.

So 1) is about luck and 2) is about time management.

He uses my car for one hour every day.

This indicates the normal state of affairs. There is no indication that the situation is likely to end. It may have been going on for years.

He has been using my car for one hour every day.

This indicates a temporary state of affairs. We assume that there will be a definite finish. We also get the sense that this may not have started very long ago.

Edit

Looking at other answers, I see there may be some disagreement. There is a great difference between what is theoretically possible when using tenses and what real people actually say in given contexts.

Although in theory the two sentences could be used to mean the same thing, the idea that they always do, is not correct - otherwise there would be no need for the present perfect at all and we could dispense with it. There is however a possibility that the nuance is different in different countries. In England where I am from, there is a clear distinction in usage.