Inner vs Outer Brake Pad Wear

2009 4WD Toyota Tacoma Base Access Cab I4-M5.
Only relevant upgrade is 17 in FJ Alloy rims (refurbished) running Michelin Latitude Tours

In inspecting my front brakes - prior to Caliper, Rotor and Pad replacement (upgrade) -
I see that the inner brake pad is fully worn down, but the outer brake pad has lots of life left.

is this normal?
Do I need to dig in more?

My humble thought it that the stock calipers are crap, thus I plan to upgrade (StopTech's?)

 

You likely have sticking calipers, they are known for it after 10 years, especially in salt regions.

I would start by trying to push back each caliper to see where you stand.

 

I had seized caliper pistons when I changed last changed my pads and rotors. Went through the stages of grief for an hour before finding 1 parts store nearby that had a re-manufactured oem caliper.

Also my pads were rusted into the caliper and the slide pins were also seized. Lots of hammering, swearing, and bleeding. I'm not even sure how I was able to stop. I bought my truck very used and just thought...crappy brakes. If you have time buy oem brake hardware from a dealer. Mainly the guide/slide pins and the little M shaped spring. The parts store parts didn't fit and the price difference was nil.

Brakes feel so much better.

 

I will be replacing my calipers.
Not worth saving them... rusted to the hilt.

 

I had success removing the guide/slide pins with a beefy punch and a hammer. Turn the wheel so you have more swinging room. Once the punch doesnt reach use a screw driver you don't care about. Pound them out a little. Then spray your automotive lube of choice, gently hammer it back in, then hammer out. Takes time but it's not that bad.

 

Crucial to lube slide pins. If using existing, sand blast them clean.