Wood interior siding? Any chance for it to look modern?

[Yuriy Tymoshenko]

Hello BP!

Its truly great to be a part of this community. 

I recently picked up a duplex in Tallahassee. Lots of work as always, but the price was great!( $34K)

It has small 3/1 on one side and decent size 1/1 on another side.

Here is my dilemma: 

The 1/1 has finished wood siding instead of dry wall. What do I do with it to make it look more modern? I wish there was a way to bleach the finished wood and make if a blond pine interior. But I am afraid that it will take me took long of a time. I am trying to spit this property for rent in couple of months. 

As additional humor bonus, I add a photos of mushroom growing on the ceiling and light fixture of water. Both are courtesy of leaky roof(its tarped now)

Anyhow, what you the wise think I should do about the walls?