Either oil or latex primer can be used over interior latex paint.
Not directly. You will need to use a primer made to adhere to oil and will accept a latex topcoat.
yes. However, you cannot use an oil base paint over a latex primer. If you change your mind on the paint, you must strip the paint before you use an oil based paint on the primer.
Yes
You can use either a water or oil-based paint over a latex primer.
Yes it can.
Yes it can.
Yes, but you can not put latex over oil without a primer coat between.
You can always paint latex ( water based )over an oil based paint as the latex just dries on the surface. However don't paint an oil based over a latex paint. Oil based paints need to absorb into the wood or other surfaces or it will just dry and flake off. For more information on the differences and when or not to use a latex or oil paint please see the following article. . http://www.ehow.com/how_4713170_between-latex-oil-base-paint.html
yes
Yes. Oil based primer works over just about any surface.
You need to prime first, with a primer that adheres to oil paints, and to which latex can adhere. You may even want to sand the oil-painted surface lightly to scuff it for better primer adhesion. Painting latex straight on top of oil paint will result in peeling.