TL;DR: Listen to your friend and understand their situation, and propose solutions. If the friend refuses all the solutions you both have thought of, change the topic and remind them that it's not efficient to spend more time on something they're not willing to change.
Disclaimer: I do not know the entirety of the situation, so I am making a few assumptions here, correct me if I am wrong.
Assumption: You have talked to this person before about helping them get a job, hence the response you got about the fact they won't get into a car with a stranger.
In this case, you are basically asking them to step out of their comfort zone, which can be tough.
I would suggest writing a short letter to the person explaining:
- Why you want to help them get a job
- Why you think a job would benefit them
- Why you feel that the person can succeed in the job
- Why the person can get past the roadblocks of transportation and figure out how to get to the job- give them solutions, like you have tried before. Other solutions might be carpooling, or trying the taxi with you for the first few times (if you can manage it)
I also think it's important to be encouraging when interacting with them, but try (we're only human, we can make mistakes) to make sure that what you say isn't pressuring your friend more than they can handle. (For example, if your friend refuses to talk about taxis, don't push them into trying a taxi with you if they absolutely cannot stand it)
After sending or giving the letter or note to your friend, let them have time to think about it. (This can be anywhere between a few hours to a week or two, it depends on the relationship between you both, which I don't know)
If they bring up complaints of wanting a job and not having transportation, you can refer back to the note, and say something like
I was wondering what on this note isn't working for you? Let's talk about it.
Can you give me any examples of why you absolutely cannot do these transportation options?
What are some solutions that could be implemented by changing only a little thing? What little things can or can't be changed?
What are some solutions that could be implemented by changing a big thing? What big things can or can't be changed?
The questions here are guidance questions for helping you and your friend figure out what options might be best for you both.
If your friend refuses to change anything, you can say that
Okay, I'm glad we had this talk, if you do not wish to change anything, you can refer back to this conversation and think about the options we discussed and any changes that could take place. When you are ready to make any changes in these approaches, let me know. Otherwise, we will be rehashing the same thing over and over. I would rather help you [do something else] (maybe job or hobby related) for the time being to keep spirits up.
If they approach this conversation again, let them know you have discussed it before, and you're ready to help when they are ready to change something. If they want to gain attention for that one thing, ignore it. It helps them realize that the only one to make any changes in their life is themselves, not others.