The brake hoses were my first worry, but I don’t know what the situation is, and it’s none of my business at the end of the day. I used to work at a law office, and I’m working to becoming a lawyer. Divorces can get nasty. I’ve never seen something like sabotage, but custody, assets, alimony, etc. can get messy. You can’t be too careful, though. If the radiator’s that bad, you’ll need a new one worst case scenario. I’d still have it checked out by a shop unless the damage is worse than the pictures. It’s not as bad that he added it to the antifreeze, I think. It definitely tainted it, but it’s not as awful as if it was just pure bleach and water running through everything. Is the carpet wet on the passenger side? It tentatively sounds like your cooling system may need somewhat of an overhaul. I’d still be very cautious with what you replace so you don’t make any frivolous purchases. But you know already that. If it were me, I may go ahead and get new lock cylinders for the doors. He could be bluffing you, but it depends on how low he’s willing to go and if he lied to begin with. You know the situation better than anyone, though, so you’ll have to make that judgement.