generally no

有否可能買一個別的牌子的室內機，和Toyo的室外機配合使用呢？
I am afraid you have to get a new one.
if this is in China, you can find someone to re-wind the motor for cheap. but in USA, no way.

Don't get the window type. It requires significant work on existing window if you want to make it look good and insulated well. Also much noisier, if you run it overnight it is unbearable.
Still get a two-units type.