my new project that I need some info and help on

Well I think I have to take off head because there is some kind of crap in the second cylinder in on the left some kind of white stuff can't even really get the mystery oil do there others you can see all the way down. This one there a lot of white stuff. I don't know what it is. If I can get the motor free I will buy a new head gasket and the ignition key. My Bro told me to do that before investing money into the bike. But like I said there's some kind of white build up in the one cylinder what could that be from.

corrosion the piston is probably seized in the bore be very carefull and get somekind of fluid in there to unseize it marvel mystery oil, diesel fuel some thing like that have you drained the oil out of it yet .

Chances are, all of your pistons have corroded on top,
and what you're seeing is that #2 piston happens to be close to top dead center and you're just looking at the top of it because it's at the top of its bore, while the other pistons are down somewhere else in their bores.
But by all means, get some oil in there and let it soak.
Something else I'd try would be to throw a little thermodynamics into it (after it soaks a few days), by taking a propane torch and heating up one side of each bore. Heat has a way of expanding and moving things around, and it might move just enough to cause a crack in the corrosion, allowing the oil to seep in. And it wouldn't hurt to tap on the bores with a piece of wood or plastic mallet. Sometimes shock waves help.
I once had an old 18hp Evinrude motor that sat upside down in the Mississippi river during the entire '93 flood. It was locked up too, but after a few days of oiling, heating, banging and tinkering, it freed up and I was able to get it running. Smokes a lot, but then, it always did. It's a 2 stroke. My uncle has it now, and still uses it.