I feel in a financial trap

Hi, the last few months have been hell. My story is complicated but here goes.
Married 15 years together for 20. Two children, 5 and 7. After councelling with Relate my wife and I decided we should part. However, I was made redundant in January and found it difficult to get another job. Having been redundant before I had qualified as a driving instructor, so this time I discussed it with her and went about leasing a car with dual controls. Things got worse between us and we agreed that I should find somewhere to rent as trial seperation. I left on 2nd May after securing a job and having this lease car.
Her behaviour became aggressive and suddenly she wanted to start taking my name off mortgage etc, after only a few weeks. She insisted that if I didnt pay half of mortgage then my equity would be upto day I moved out. I carried on paying household bills upto Mid July when my debits started to bounce.
I have a loan in my name of 15k and credit cards of about 5k. We agreed when we were happy that because I was main income that anything like that should be in my name. From that 15k 6grand went into a high savings account. She will only admit 3k of the liability.
Our house is worth 160k with 130k mortgage. She wants me to have 50% equity but for me to use my share to pay all the loan off therefore taking nothing. I want the best for my children, but she now earns 8k more than me with a good pension and greater earning potential. I am now 3500 overdrawn at the bank and only have 1600 coming in. My new job is long hours little pay so my time to teach driving is next to nothing.
She wants house to go on sale as the family home is too big for her to manage herself. I agree with that but the moving costs are going to come out of both our share of equity which is peanuts. She has now asked for a larger share so that she can put a bigger deposit on a new property. I found a nice place to rent but now cant afford it, so at 36 years years of age am now going to stay with my sister. I can buy myself out of my lease but at a cost of £1200. How do I pay for that?
Also at xmas she booked a holiday which I paid for on credit card. She didnt want to take children so I went thus spending even more money. I know memories are more important, but I really would have booked somewhere much less expensive.
I could write for hours and hours. If anybody can offer me advice that would be fantastic. I consulted a solictor twice but have fallen short of her last fee so she wont progress my case. Thanks for reading. NJ

I have sent you a PM with some suggestions which I hope you find
helpful.

Mike