Dude. Jai's not a dude.
Those plugs are very fouled. I'd install new plugs, take it for a good drive, make sure it gets nice and warmed up, then pull them and see how dirty they are. Looks like it's running very rich though, unless you're burning oil. Does it use much oil? They really should never get that dirty unless there's a problem. A short test run on new plugs will give you a good clue though.
tx is right about the leak. At least you know it's hose-based. Those are both low pressure hoses, one is 5/16" and I think that 3/8" works on the other. The 5/16" is a good fit, the other is a bit tight, if I remember right.