When I was replacing my air cleaner, I found it much easier to work with by disconnecting everything right at the front of the throttle body. Trying to work down behind the front of the hood was a pain in the back.
Besides, it would be good to look inside the throttle body anyway. If it is all grungy inside, you may want to clean it and perhaps consider that too much crud is not getting filtered out of the air and going into your engine.
Might be a good time to replace that accordion style coupler hose with a smooth one.
I've seen cleaning kits at most of the online dealers for the filters. Includes an oiling kit to apply to the filter paper element(s). Just be careful you don't overdo the oiling, otherwise oil will get sucked into the air cleaners and foul the MAF sensor.
All the electronics just plugs in and will be easy to remove and put back in. Just don't FORCE anything.
Just from eyeballing those filter elements, they don't look too bad to me.