When I go and click on a brigade, I click on the brigade commander, TC him and nothing in the tool bar changes. I TC all units and nothing changes.
TC'ing the brigade commander wont change anything on the toolbar. What it does is remove him from the chain of command and places him directly under your command(and disabling the AI's ability to command him.) The brigade commander becomes a brain dead zombie, solely under your command. He also wont issue orders to his subordinate battalions, save for whatever orders you issue through him.
The same holds true if you also TC all the battalions under the brigade commander. At that point the brigade commander becomes pretty useless because now you've removed all his battalions from the chain of command as well. Now the battalions are brain dead zombies to. If you issue a formation, wheel, flank, whatever order at the brigade level from the brigade commander, the battalions will not respond to the command because you have disabled their ability to do so. You can only command them yourself, I.E. you have to click on each individual battalion and give them specific commands yourself.
For example, I can't deploy them into line, wheel them...I CAN select on the regiments individually and move them around. When I select the commander, the commander goes wherever I want but there doesn't seem to be an option to wheel, form line...etc. for the entire brigade as one.
This is in line with what I just said. If you have the brigade commander AND all his battalions TC'd, the brigade commander will be pretty much useless. In order to issue brigade level commands you can have the commander TC'd, but not his battalions. The battalions must be under AI control in order to respond to a brigade level formation order.
Also remember that wheeling is an individual command, unlike say oblique movement or flank movement. If you click on the brigade commander and hit wheel, you will only adjust his facing, not the whole brigade. In order to have the brigade match the commanders new facing you have to select a formation after you wheel the commander.
Example: Your brigade is set up in double line facing north. You want to keep the same formation but want the whole brigade to adjust their facing so they face northwest. You would select the brigade commander and wheel him until he was facing northwest or whatever way you want him to face. Once you've got him facing the way you want him to, select the double line formation under the movement tab and the whole brigade will now adjust their facing to match the new orientation of the brigade commander.
Also, in case the word "line" is being misconstrued here, there is no brigade formation in the KS mod called just "line". There are different variants of formations based on the line such as double line, line with reserves, column of regiments in line etc etc. In general these are pretty self explanatory and, if in doubt, simply form your brigade into them to see what they do. However, results may vary depending on which tab you select these formations from.
For example, using a brigade consisting of 5 battalions, if you form double line from the movement tab it will put 3 battalions out front in line formation and 2 battalions in reserve behind them in column by division.
However if you hit the same double line formation from the combat tab it will instead send one of the forward line units out ahead in a skirmish formation, bring up one of the column by division units from the rear to take that units place, and bring the other column by division unit closer to the front line.
Its considered to be the same formation, its just a more "combat" ready version of it.
Some combat formations can also be the same as some move formations to. For instance the combat tab formation "Column of regiments in line" will give you the exact same formation as the move tab formation "Double line"
Just experiment by forming all these different formations and comparing them between their move tab deployments and their combat tab deployments to see what they do and decide which ones are best. That's what I did.