brake issue

[Jay1973]

Hi all I have just bought a 2003 Boxster S in the UK and driven it home to Spain I found the brakes a bit on the spongy side and came to the conclusion that its most likely in need of a fluid change or bleeding.

I decided to check out all the pads for wear in case I need to change them at the same time and I'm not sure what to make of what I found.

Front right : pads are ok about 25% worn and even but the disc/rotor is smooth on the outside but has some corrosion on the inside and is uneven.

Front left : pads are 75% worn the inside pad slightly more the disc is again smooth and even on the outside but has very slight corrosion on the inside but not as bad as the front right

The rears are equal the pads have plenty of left on them and the inside of the discs are little less smooth to the touch than the outside

Any help would be appreciated