LittleUnknown

Hey, I have a question about my 98 Pathfinder. I've named her Bertha and I've grown very attached to her, but she's been leaking oil pretty bad. I, myself, know nothing about vehicles, but my boyfriend is a major gear head. He's looked at her for me and said he can't see where it's coming from exactly, but it is coming from one of my bottom seals and dripping onto my manifold, which in turn, is making her smoke like a freight train. I was just wondering if anyone could shoot me a ball park of how much it will cost me to have her fixed and if it's even worth it? She also has a bad axle and her ABS light came on two days ago, just in case if that has anything to do with anything at all. Like I said, I'm not very car savy. Please and thank you for your help, Mahela