Ask regarding career growth, hows working life there, go into linkedin and ask those who are working is the same dept. you have 7 days to respond, so much time and you can tell them you will answer at 6th or 7th day.

No point if turnover rate is high due to high stress and no work life balance. However, since this is your first job, I would encourage you to proceed with it first and only jump after 1 year (if really not suit with you, 6 months you should stay there).

Do not commit to any car loan/house loan yet.