Vacuum lines and emissions components

[sgr60]

I've gotten around to poking around in my engine compartment in order to get an idea of what my next steps are going to be. One of the things that's new to me on this truck is all the emissions stuff and the huge amount of vacuum lines. I like to keep things clean and simple, so I am going to look to get rid of as much of this as I can. I realize emissions components aren't supposed to be removed - nevertheless, if it won't hurt the performance of the engine by being removed, I'd rather take it off.

I took a few photos and I'm hoping folks can help me to identify what some of these are:

Red Circle - I found these hoses cut when I bought the truck - no idea what they're for or why they were cut. Has anyone seen this done? Should the ends be capped?
Blue circle - this went into the stock air cleaner - which I no longer plan to use in favor of a simple chrome air filter. What should I do with this hose? Cap it? It leads to a T connecter - one end to the vapor can, the other I can't remember.
Yellow Circle - what is this MESS? All of these hoses are degraded and tangled up. There are two pieces of hardware in there that some of them connect to - are these the one is connected to the thermostat housing and the other is right next to it. Can I remove these and just cap the ends on the block, carb, etc. where they originate?

Sorry for the basic questions - this is all new to me.