I recommend NEVER agreeing to use your own car for...

I recommend NEVER agreeing to use your own car for non local stores or they will come to expect it, and its much harder to say no once you've given in. Also expect to be overworked. If you are a person who has a hard time saying no then your work/home balance will become almost nonexistent. I was called in on my days off probably more often than not. Unless they pay to to be on call (they dont) you are not obligated to come in last minute. Take care of yourself. You only have one body, one life. Don't destroy it for this company (or any company). If you absolutely need a job quick I would recommend. Just not long term.