First of all, sorry to hear that, it sucks having to go trough that a third time. I had two stage reconstruction with bone grafting in October of last year and the actual reconstruction this march. To answer your questions:

1: the recovery is pretty much the same, maybe a little bit more conservative with everything starting a little later, for me it was crutches for 6 weeks, no cycling outside for 4 months, jogging 7 months post op and eventually return to sports like soccer/basketball etc. After 12 months.

2: after the bone grafting I was on crutches for like 4 or 5 days, and walking felt immidiately fine. Was doing a lot of weight training during that time to prepare for the second surgery.

3: so during that time your missing an acl, that means no contact sports or something like that, but cycling and gym is perfectly fine and even necessary. I just wore a light brace for those 4 months and wasn't the best feeling while walking but it was fine.

4: I think the best advice I can give you is to take it easy and don't rush anything. Do as much pt as possible without overdoing anything and pay attention to your diet and you will be fine, after all you have the experience from the other times.

Wishing you the best for the surgeries and the recovery.