Recently (following slight bad weather) I noticed the floor was wet right next to the door, so i lifted up the carpet of the mini and found this:

Now it passed it's MOT in February, so I'm not sure what the deal is. Anyone care to elaborate?
Here is the paintjob, clearly you can see it's badly finished.

Also here are my unfinished sills



And here is the rust under might lights and the rust bubble next to aerial.


What should I do? (im a noob)
Thanks very much for your help
