2015 Tacoma Access 5 speed M/T 140K miles new to me - Spark Plug Fouling

Hello all. I have a new to me 2015 Tacoma that has 140K miles. I'm doing all the fluids, filters, etc and today was MAF sensor and throttle body cleaning plus spark plug replacement.

I looked through the forums and found a couple similar situations so I am leaning towards the "it's probably fine just move on with life" camp. I have no idea if the plugs had been previously changed or not. Attaching some pictures of the spark plugs I pulled out today. I am also including a couple pictures of the ignition coils as well that had some residue on them. Also there is a new vs old comparison picture.

Should I be worried about any kind of gasket or seals or just move on with life and re-check in 5K miles?

Thanks

 

Looks just like my new to me spark plugs I just changed. Double the spark plug gap @.090 but still ran fine before change. Amazing

My 4.0 showed signs of an oil leak. I figure after the pressure wash we'll see if it was just years of light seepage

 

Looks fine to me, I don't see any evidence of oil that would indicate tube seals leaking.
The residue is from a slight amount of combustion gas leakage around the plug, some plugs leak abit more than others and can leak more if they aren't seated correclty (ie not tight enough).

 

Believe the TT is a newer model iridium dual tip vs the

$53 SK20HR11 ---- IRIDIUM PLATINUM power pack Spark Plugs -- # 3421 ----- 6 PCS NEW

SK20HR11 plugs in the 4.0 which I used.
Then yes they were probably changed and looks like not tightened down to seal fully.
Did mine and opinions are about 50/50 on the anti seize (nickle type is best/highest temp) but I always use it as hard to get plugs out after 100k miles without.
Just a light coating up a few threads from the end about finger width but again up to you.
Once plug is on crush washer the plug box states a 1/4 turn (or torque to Toyota spec for your engine and year 15 ft lbs) but do NOT over tighten and break a plug.
I use a 3/8 drive and do all by feel carefully. Clean those coil boots off and then put some dielectric (non-conducting) on boot or ceramic part of plug so it will come off easy again but not on conducting end of plug. At the top of the coil you can clean that rubber seal and add some dielectric to keep crap from dropping in the bore after install. I would not check them after install unless an ignition problem as they should go 100k.