Photograph mask, adjust lighting and shadows in Photoshop

Full brief here with image references [login to view URL] All images will be supplied as hi-res 4032 x 3024. I plan to composite together a number of photographed images onto one white tabletop (by me afterwards) Tabletop will be off-white background colour #ededeb. Currently the lighting varies from photograph to photograph and the background white is not consistent. I would like someone to: 1) mask out each object from the background in each image. 2) Adjust the images so the lighting and colour feels consistent across the images 3) Adjust the images so they feel a little more vibrant (not overly so). They feel a little washed out as I was only able to shoot in daylight as I have no professional lights. 4) Adjust the white background in each image to be the same colour #ededeb. I want to keep the nice soft shadows cast by the objects. Can you expertly recreate the shadows in photoshop otherwise? This needs to look professional. NO jaggies or white outlines around masked objects. Photos delivered as .psd files with layers. Colour correction etc rendered as adjustment layers only - not directly to image layer. If you bid for the project, please include an example of compositing and/or shadow creation in photoshop. Fast turn around required 24 hrs ideally.