Configure 777 FMC, what i forget ?

Hello guys

Im flying this great 777-200LR since one week and im searching another issue to fix my problem.

First i often flew in PMDG MD-11 and it was great experience too

So, when i configure a FMC i can't get info about my PER INIT REQUEST when i click over.

It's the same on the TAKE OFF REQUEST page.This appear in grey and i can't get information about requests... What i forget ?

Step first i go to Fs menu take a fuel and second in perf init page to configure the fuel and other parameters

Step 2 i go to enter my destination fly number SID/STAR etc... and writing my route in the FMC;

Step 3 i come back to perf init, trust limit and take off to get my VS speed and flaps configuration for take off.

So the options off the REQUESTS stay in grey.Im sure i forget a parameter.

Second question:

When you are in final approach, do you disconnect the TOGA or continue with it ?

Actually i disconnect the AP when i arrrive to my MDA alttitude.

Thanks a lot for you next answer

Ps: im waiting a link to download the extended package of this pmdg.