yes take the job, the tax credits are based on how much you earn and the hours you work (you have to work over 16 i think). the tax credits should help towards other expenses. Once in a job you will find it easier to find another job. Also, bear in mind that you should still be able to get help with other expenses, they wont just “stop” – speak to the benefits people, they will know if you can claim council tax, housing benefit etc