I've been lurking around the forum for the past few days getting ideas on a different suspension. Currently I have bilestine shocks in front and rear and i have no clue what my coils are. Stock i assume? Anyways. I have a front and rear steel bumper, front has a winch and the rear has a tire swing out. Its been almost a year and i've noticed that both front and back dropped by probably a quarter to half an inch, if not more. The bilestines give about 2.75 inch in total. From the research i've done on these forums, and others, i've decided to swap the rear coils for LC and front for Tundra TRD. Some of the questions i have but can't find an answer:

For LC coils:

When choosing LC coils, i have to buy fronts to put on the back of my T4R, correct?

Will i need to change my rear shocks?

What does the "paint code" have anything to do with anything and what one should i choose?

If i do have to get new shocks, are these a good choice? Skyjacker N8055 Shock Absorber and Strut Assembly | Auto Parts Warehouse

For front:

Will the TRD Tundra coils need new shocks?

These are the part #'s i found on this forum for the shocks.

Left Coil Part Number: 48131-AF100
Right Coil Part Number: 48131-AF090

Except they are selling at an outrageous price. $250+. Any place to find them cheaper?

If anyone can help on any of these questions it would be greatly appreciated and i apologize if its too much at once. I just don't want to miss anything.