Welcome to the forum. You should be able to get that wing into your car. If you let the passenger seat down it can go diagonally, or if the back seats will fold down and give you truck access it could work that way.

Engine choice-2 strokes are a little easier to tune and generally have fewer things to go wrong with them.

For ailerons, you just build the wing and then cut them out. Then make a leading and trailing edge for them so you can install the hinges.