All in one Virtual instrument (Pro Tools) recommendation, convert midi tracks to audio help

[Neznamnista]

Hi,
I am user of Pro Tools 10, and I want to buy a Native Instruments Komplete pack for instruments, but I am new user and I need some help related to best choise for my prupose. (kontakt, battery, reickenbecker bass, guitar rig, fm8...).

My friend is musician and he has already his all of his songs in midi format...he want to give all of them better sound and with via Virtual instruments to convert it to audio. I know some basic workflows with. So:

1) When I imported midi file, then all channels will be separated in main window.

2) I make several instruments track and put into some Virtual instruments, for desirable instuments.

...

What to do next? I know that I must put my midi to the output of one instrument track...? Make new several audio tracks...?


Second question is related to choise of the best Virtual instruments for PT (Native Instruments as well). So, can you give me some recommendation for next intruments :

1) Piano

2) Drum set (all)

3) Bass guitar

4) Electric guitar


Is there any VST which has into all samples for any of those instruments all in once, or I must have it separately?


In other words some good choise of Virtual intruments for rock music.

Thank you in advanced!