Sorry I didn't reply on Friday and I got super busy yesterday... I typically stay off forums on weekends. Well, very rare that I am online then. lol
Anyway, I would start with 5-10mg per day. You can easily run it between 4-6 weeks and some even push it to 8 weeks. It all depends on how you respond to it. I personally stick to a 6 weeks max and so do most of the guys I work with. It's plenty. Sdrol is very different and actually pretty awesome... well, if you like to wake up dry looking, hard and very vascular and abs popping with great recovery. It doesn't aromatize either. I find that sdrol is incredible with the look it gives you in a short run. You can use sdrol in both a bulk and a cut. It will add lean mass but also preserve it if you are running during a caloric deficit. I think it's very complimentary to tren or deca. The strength you get from it is pretty quick and awesome. The fact that you will add on lean mass fairly quickly, but also keep fat gain to a minimum (obviously diet plays a key role) is pretty great. Your recovery will be great on it too as well as endurance where you will feel you can keep going hard in the gym. At least that's what I found.
As for toxicity of it. In oral form, it's just like anything else in my opinion. Just avoid alcohol when on it just as you should with other AAS. If you have liver issues, make sure you are using a liver supplement. Also, sticking to the average 10-20mg dose should be fine. I think you may get yourself in feeling a bit shitty once you enter the 30mg or higher territory which IMO is totally unnecessary. As for the injectable, it is gentler on your liver but again, be smart about it.
Hope that gives you an idea...