Your kit comes with some novus, which is what you want. If the playfield is dirty, clean it with #1. If the dirt doesn't come out, try #2. If it still doesn't come out, leave it. Buy some carnuba paste wax (not cleaner wax or synthetic) and wax the playfield afterwards.

Don't spray anything on the relays. Unless you're good with EM tech, don't touch them unless there's a problem, and even then the only thing you should be doing is filing or adjusting them. Although they look dirty, only a tiny bit of the contacts needs to touch to make them work. They're designed to be self cleaning (of that tiny bit) as they brush past each other when the relay activates, so as long as you keep playing the game regularly they should stay clean

Your kit also includes sleeves, which is good. You can disassemble the flippers and pop bumpers and replace the coil sleeve. Your game could probably use a full flipper rebuild. pbresource sells kits for that, it'll make the flippers stronger and snappier.

Absolutely not.
Do some reading here.
http://www.pinrepair.com/em/index.htm

Jungle Queen is a great game. Welcome aboard and have fun!

No oil, spray, or lubricants.

Start disassembling parts beneath the pf and clean them up using steel wool. This will help you see how the mechanical parts work and what may be dirty and making them "bind" and not feel smooth/correct.

Have fun!

Stop thinking spray/oil/lube/love

Start thinking filing switches, adjusting, and learning how these things work.

Do NOT ever spray or oil anything. You’ll ruin the game.

And no steel wool anywhere inside! It sheds fibers that will cause shorts.

So no love-lube. Gotcha.

Seriously though. I'd do the following:

- add your location to your profile - a local can help you out
- read that pinrepair link
- if he still sells these, consider this DVD - http://www.pinrepair.com/top/top1.htm
- make your next parts order from Pinball Resource - http://www.pbresource.com/
--- get the schematic from him if you don't have it already
- After cleaning the playfield, I'd concentrate on getting it working instead of cosmetics
- I'd tackle the score reel issue 1st, # players 2nd, drop targets 3rd.
--- post here with description and details/video of your first problem

Yes, that's important, not inside the cab - but once the mechanical part is removed, you can steel wool it and then make sure all "particles" are removed from the part by blowing it out with a can of air.