You have three different laminate floors. If you want unity, you need to decide what will give you unity faster. The floors are close enough to ignore there differences. Without seeing the wardrobe units I can only guess what will work best. Add photos of the units you are contemplating and you will get more responses.

Hello, It depends on the thickness of the veneer used earlier. If you are lucky and a thick veneer was used then it can be repolished. You need to get it inspected. Costlier option would be to have it veneered again. And if you are not repulsed to paint, as you seem to be to laminates, even that is a viable option. Thanks. Amit CORNERSTONE DESIGNS Bangalore.

I agree when you say sliding doors are difficult to maintain, especially when it comes to cleaning the tracks of the door. At first you may make the effort, but later you will so regret it. Hinged doors are easier to maintain. They are a blessing!

There are multiple ways of making that depends up on dimensions and thickness of the door you can join the ply or block board using joint pins and use door stiffener which you get in any hardware brand you can make a frame with aluminium pipe and use MDF or less thickness material and sandwich the frame Outsource to professional door making people but make sure the inner laminate is used more than 0.9mm which majorly sometimes responsible for the bend