Oh honey, you poor poor thing - i know how horrible debt can be, it can feel so overwhelming. Have you spoken to anyone about the repossesion? can it be avoided? If it can't then fuck it, its only a house - it could actually work in your favour, you will be entitled to housing benefits if you are not working etc, if you are working you'll get help. It will be shit, but afterwards i think you'll think it was the best thing that can happen. You HAVE to take this attitude to it you have to.
Have the cscs offered a definate plan of action? IVA? debt management plan? We were in a terrible state, we owed so much money, behind with mortgage but the worst thing was the multiple creditors harrassing us for money all the time. The solution for us was a debt management plan and now we pay £100 a month on 15k worth of debts and will be clear in 11 years. It seems a long time but £100 is managable.
You seem very calm and practical about taking your life - so redirect that calmness and objectivity into sorting your debts out. If the house goes, its a new start, a clean slate for you and your daughter.
The other posters are right, your DD needs YOU, you wont be on the streets, that wont happen it just wont.
I have been suicidal with the pressure of debts and struggled for a long time, with the help of mumsnet, my DR and anti-depressants i got through it. We still have debts, im not convinced we will keep our house, but i know i will get throuh it. I woudl imagine how i would do it, but then i would imagine my DD visiting my grave and that snapped me out of it.
There is no-one like your mum, please try to imagine your DDs first period, she will want her mum, when she is falling out with her best friend at school, she will want her mum, first boyfriend, she will want her mum. Picture her wedding day, the happiest day of her life, but there will be a big pit of sadness in her tummy because her mum isn't there. Everything good that happens to your DD will be tainted if you do this because you wont be there to share it with her. Everything bad that happens to your DD will be worse becaues you wont be there to get her through it.
Try and see past this horrible stage of your life, its at rock bottom just now, but two years down the line it will be sorted one way or another, you'll be on top of your debts, you might have a new job, a new man even, you'll be in your kitchen making a cup of tea and just feel overwhelmed with a sense of calm and happy, your DD will be 12 and entering into a really big stage of her life, she will be making decisions at school about what she wants to do, you'll be helping her with it, you will have girlie nights in together watching your favourite tv programs, i think you'll have a cat too, a ginger one.
Be strong now, you have hard things to face, but the good stuff is waiting for you - i promise.