My big male chow had TPLO surgery last easter, he also had 60% of the meniscus removed... He's made a complete recovery, and I'm so glad I had it done now, he runs jumps and generally hoons about like a big pup without an ounce of pain or discomfort.
The surgery as I'm sure you've been told is pretty big... Benny was kept in for 2 nights for obs, then released to be cared for at home. He came out walking pretty well, his leg was heavily bandaged and there was a splint inside it for support, this was left on for another 3 days, then removed by a local vet.
Activity has to be minimal in the early days, and you're recomended to crate your dog, if you're not with them. Luckily I work frm home, so he was rarely in the crate. From day one we were told to only take him for pee and poo breaks, avoid stairs, and support his weight, we used a dog sling for this, but a rolled towel does the same thing, we did this for the first fornight, then our specialist told us we could let him walk on solid flat surfaces for at first a few mins, then building up to five, ten mins at a time about 4 or 5 weeks post op. He was never to be off lead, infact our specialist didn't recomend any off lead til 4 months post op min.
Benny's progress was pretty case book thankfully, he never had any wound probs, and has no problems with the metal work. He has the metal plates and also a metal lasso to restrain the movement of his knee cap.
With Benny everything seemed to move on really well till about week 5 or 6 when it plateaued out a bit, I got a bit despondent then, but at about week 12 he suddenly massively improved, and began to load bear properly, until this point, he would toe touch when he was stationery, even though he was walking fine.
I used ttouch and massage on him to help him relax through his recuperation, and to tell you the truth, the whole experience helped our bond grow and my understanding of his needs and my other dog for that matter become much stronger and clearer.
If you want any more help or info,please feel free to pm me

To be honest, you're going to be far more traumatised by the whole experience than your dog is, believe me I was
BTW, Benny doesn't have even trace of a lmp now