NEED HELP!!!!

So today I was changing out the oil on my 2005 double cab long bed and had a couple of concerns, and I want to see if any of you guys have any thoughts or have seen this before.

When changing the oil I took the oil filler cap off and found a thick creamy white residue inside the filler neck. I'm think moisture but the oil looked relatively clean and wasn't milky at all, it was only in the filler neck and on the cap.

Second thing I noticed was the rust on the frame... It appears to have quite a bit of rust for a truck that isn't even 10 years old, starting to see sections that are bubbling up!!

Needless to say I'm pretty concerned about both! I've almost started talking myself into the idea of needing to trade it in so I don't have something serious happen!!

 

It doesn't look like there are any holes that I can see yet, however there are spots where it is bubbled up and I can flake some of it off with my finger...