Why everytime I export a model it have no textures? 
Did you add textures to your objects material ?
Were they image or procedural textures ?
Export to what ?
Blender version and operating system ?
Does it render in blender
Are the textures packed into the blend file ?
Please supply any other information you think would be useful for anyone who may want to help you.
Attach or post a link to your blend file, including ALL textures