general problems of the 2004 Toyota 4Runner

I've put a down payment of 1200 at premier auto sales . In victoria TX I left feel positive about the vehicle . The sales man told me as soon as they get a mechanic to look at it . It didn't have an inspection either . So I took it to p&h all they did was right in a paper an sent it back with me to the car lot after I picked it up from it being dead the battery terninals where horrible the check engine light came on the oil light after a brand knew oil change kept smoking so took it back so they could look at it to find out they just cleared the codes . Picked it out he following Monday well the vehicle smelt like it was burning had to use my emergency brake to stop . Called them and the sales lady in the front said it wasn't their problem still within the 30 day period so took it to the brake place down the road from them my brakes were so back they had to change everything he said I could have caused a wreck because of them being so wore down . I called to make arrangement with them and they were just being ugly about the situation over all . I've tried to be nice and do the right think this was unsafe for me as well as my children .