Hmm... You ask a lot, maybe better to read, google and study than try to ask all imaginable questions here? There will be many questions that you don't
understand to ask before you read more about this subject.
Even so I try to reply, but do search more info and do come and ask more when you are more "in" to this.
Here it goes:
Are LitecoinBAMT compatible with all wallets also when there will be new coins ?
Keep your wallet off your rig that uses usb-stick for hd! Use your computer and maybe paper wallet... (Google this)
Is it possible to monitor the status of the rig using a tool like if cgminer works, if gpu fail etc, is it possible to install teamviewer or similar, the drivers of hw will be installed automatically ?
Litecoin BAMT is ready to use, if in trouble search google. Don't know about teamviewer (google this), you can use ssh thru xrdp from your computer to access your rig. Some pools notify when low hash-speed.
Can you configure more than 6 gpu if use splitters ?
Don't know this for sure (google this), but I doubt this. Why use splitters, when they cost as much as MB and you will also need another PSU?
Is it easy to manage undervolt of gpu ?
I think that in BAMT/SMOS you can't under-/over-volt GPU's (search google)
Is it easy to install or i need to find all drivers of mb,ethernet, gpu etc..
Just plug and play, if your USB has been written correctly. Sometimes you have to search for the good quality-stick. (Search google)
As you can see it will save time for you and the people that reply to you, if you search the google first!