Leaving an emotionally/mentally abusive relationship

So I left my narcissistic ex a week before christmas.(we were living with his parents, they're just like him) and the years of build up just got to be too much and fights kept happening so I decided a week before christmas it was time to leave. Not an ideal time to leave when a kid is involved but i needed to go for my mental sanity. Cops ended up coming, I couldn't leave with my son. Going through the battle of getting my son back with me. Living with my cousin now. His dad wants me either out of his life cause I left or just visitations. The courts have been no help and I just feel like I'm drowning in all this. I haven't seen my son since I left because he won't let me see him unless I go back to that house.. Anyone have any ideas where to get cheap/free toddler bed or clothes. I just need to get the essentials here for when i get him back with me.