You have a few options here. You can go out and rent a few tools. Whichever you decide is on you. You can get a spring compressor (Autozone typically lets you rent them for free, if you sign up for some rewards card) but they can get dangerous if you don't know exactly what you are doing, or aren't careful. Or you could try a impact gun, which might aid in removing the control arm bolt.
As far as the track bar, I'm not sure as to what your problem is, but you should get enough downtravel, without completely removing the track bar. I might be wrong, i'm not sure what size lift you are putting in. If you stripped the bolt then just go to the hardware store and get a new one.