It doesnt matter it should just fit
If the trucks use 8mm bearings (probably do, most of them do) then yes.
Longboard wheels have a small hub, or core, inside it. Skateboard wheels also have this. This allows you to put bearings inside of both of them and can interchange what trucks you put on it. Generally, longboard wheels fit on normal skateboard trucks but a problem you will encounter is wheelbite. You may need to sand the board for wheel wells or put big risers on your board. Another solution is buying harder bushings for less turn and lean.
It depends on the size of the wheels. I'd recommend Tunnel wheels.
It makes it slightly harder to do tricks but it will help keep the board stable. I recommend getting some rises to help increase your pop of the board
you mean trucks and yes you can but the easier way is to put a bearing onto a truck then push the wheels onto the bearing
yes you can
It's not actually the size of the skateboard that matter's, its the ball bearings the wheels have inside them. Cheap bearings that come with cheap walmart/warehouse boards almost always go slowly, were as proper bearings from your local skate shop will go a lot faster.
It's when there is a hole in the deck where the trucks go and trucks go above the deck it's just a "lower to the ground" ride. the only thing is you have to take the hanger off the base-plate to put it on then screw it back on.
you put them on the bottom or you take off the grip tape and them on top
Get some clear glue and put a thin layer of it on your board and then pour sand on it. make sure you don't get any of it in your trucks or bearings!
if you start out plain you pick out a deck you want. get it gripped up and then your gonna need some hardware and trucks you want for your board. put the trucks on the bottom of the board and fasten the hardware in as well, tighten til you think its perfect. the grab some wheels and bearings put the bearings in the wheels and screw the wheels onto the trucks. when that's finished go hit up the streets on your new board.
With modern tow trucks you can tow anything. -If it's a 4 WD and you don't want wheels to roll, they put a dolley under the back wheels.