Do you have an option to install a restricted hardware driver for your video chipset? One possible reason for the video issue is that your currently installed driver does not support, for linux, the resolution you desire. A more updated driver might be the solution.
The alternative explanation that seems likely to me is that you just need to manually edit your xorg.conf to allow the resolution(s) that you desire.
For wireless, I think you really need to start with one of the wireless walkthroughs. There is a wealth of good tutorial help already written and posted on this forum. Start with capturing an lspci, lsusb, and iwconfig to a text file. There are a lot of reasons why wireless might be not working for you, but the top of the list is that you simply need to configure your local network: disconnect your landline, L-click the network icon, and select "other wireless network" to get started.
You really need to branch this help request into two seperate requests, but first use 'search' on this forum.
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