those question marks only indicate your system is not showing drivers for that hardware... last time I reinstall the os on a dell system dell made it a little bit tricky to reinstall the drivers... if I remember correctly you need to run the software on the cds to install the drivers (don't try to install the drivers with the windows wizard as probably the drivers are nicely packaged in the cd.) so look for some setup.exe application on the cd's you may have.. (assuming those are the cd's that came with your system) run it and follow the instructions.. from that point it should be straight forward.
if you don't have the cd to your system here's the driver download website from dell for your system
(check if it is your system first)
download what you need first and don't run everything at the same time. install one at a time and restart as prompted and then move on the next driver installation, until you get all the ? marks out of device manager.