Well, I guess my post was rather vague and didn't address your questions very precisely. My apologies. I'll try to answer more specifically.
1. If I take mixer unbalanced outs, and I connect to a a gear (unbalanced connection therefore), then take the same gears Balanced outs into my mixers balanced in, what signal am I actually getting on 2 bus?
If you use the balanced 2-bus outputs of your mixer, your signal will be balanced. If you use the unbalanced 2-bus outputs of your mixer (if it even has unbalanced outputs), then the signal will be unbalanced.
2. If I connect to my mixers Balanced ins different sources, some balanced some unbalanced, what does this actually mean? That I have some balanced+unbalanced signals together or will my overal signal path be unbalanced?
Thinking in terms of "overall signal path being balanced or unbalanced" has no relevance. Each individual part of your signal path is either balanced or unbalanced. And it can change from one connection to the next. It all depends on each piece of equipment's inputs and outputs. The signal can change from balanced to unbalanced in various parts of the chain.
Balanced output -> balanced input = balanced connection
Balanced output -> unbalanced input = unbalanced connection
Unbalanced output -> balanced input = unbalanced connection
Unbalanced output -> unbalanced input = unbalanced connection
And remember that even if you have an unbalanced signal at the input of a piece of equipment, you can still have a balanced signal coming out. Or vice versa. This is because the internal circuitry is all unbalanced, like I was explaining before. At the output of the device, there is a differential amplifier or a transformer which converts the signal to a balanced signal. This allows you to connect it to another piece of equipment with a balanced input to create a balanced connection. But once the balanced signal reaches the next piece of equipment, it is converted to unbalanced again, because, again, the internal circuitry of that gear is unbalanced.
I don't know how else to explain it...does that make sense?