All the missing pieces and replacements are listed below (list taken from toysperiod.com).  Pieces are generally clean and decent with overall good color.  Might be a little minor yellowing here or there, but nothing too bad.  No manual. 

4588    Brick Specialty 1 x 1 Round with Fins    1    
    Black
    4595    Brick Specialty 1 x 2 x 2/3 with Studs on Sides    1    
    Black
    30034    Panel 3 x 5 Solar/Clip-On/Deltoid    4    
    Black
    3039pb16    Slope 45 2 x 2 with Gold and Red Roboforce Display Pattern    1    
    Black
    2449    Slope Brick 75 2 x 1 x 3 Inverted    5    
    Black
    3069bpx33    Tile 1 x 2 with ROBO Gold and Yellow Pattern, Red    3    
    Black
    2431px10    Tile 1 x 4 with Gold, Red and Blue Circuitry Pattern    1    
    Black
    2399    Wedge 3 x 4 without Stud Notches    1    
    Black
    4859    Wing 3 x 4 with 1 x 2 Cutout without Stud Notches - Wedge Plate    1    
    Black

    973pb88c01    Minifig Torso Space RoboForce Gold Circuitry Pattern / Light Gray Arms / Yellow Hands    2    
    OldDkGray

    3007    Brick 2 x 8  (2 replacements included in black)
    OldGray
    4276    Hinge Plate 1 x 2 with 2 Fingers    (1 is yellowed, 1 replacement included in black)    
    OldGray
    73590c02a    Hose, Flexible 8.5L with Tabbed Ends (Ends same color as Tube)    4    
    OldGray
    3029    Plate 4 x 12    1    
    OldGray
    2342    Tile Specialty 1 x 2 Space Control Panel    (1 replacement included in old dark grey)
    OldGray
    2399    Wedge 3 x 4 without Stud Notches    1 (2 replacements included in blue)    
    OldGray
    4856    Wedge 6 x 4 Inverted    1    
    OldGray

    2569    Antenna 9.6 x 1 Whip    1    
    TrNeonGreen
    x168    Minifig Headgear Helmet Underwater with Hose, Headgear    1    
    TrNeonGreen
    2466    Panel 3 x 2 x 6      1    
    TrNeonGreen
    2468    Panel 3 x 3 x 6 Corner Convex    2    
    TrNeonGreen
    6152    Windscreen 6 x 4 x 1 & 1/3    1    
    TrNeonGreen

    3069px5    Tile 1 x 2 with Clock Digital Pattern    1    
    White
   
    3626bpx157    Minifig Head with Silver Sunglasses and Electronics Pattern, Glasses Red Headset    1    
    Yellow
    970c11pb05    Minifig Hips and Black Legs with Space RoboForce Gold Circuitry Pattern    1    
    Yellow