Can anyone recommend a good starter set?

Hi! I am Ted from the Philippines. I used to own a model train set when i was a little kid about 20 years ago. I think it was an HO set. However, my mother over-stored it as I could not find it anymore. Recently, i came across a used Roco N-scale starter set. Now, i wanna expand the set and build a complete layout. I would like to buy more tracks, box cars and locomotives. My question is, are all N-scale tracks compatible with the other brands? Will any N-scale locomotive work on any brand of track?

Will the different brand of locomotive work on the same power pack/speed controller?