I can't watch dvds and i have no wireless internet connection

For the wireless card, we need to know what type of card it is. To get the information we need, open a terminal (should be Terminal in Ubuntu). Type sudo lspci, then post the output from that back here.

For the DVD's, what do you mean you can't read DVD's? Is a specific program not reading DVD's or the computer itself? I'm assuming they worked fine before you installed Ubuntu, which means the drive's ok (also means we should be able to get DVD's working in Ubuntu).

If the DVD's just aren't appearing on your desktop, try opening MPlayer or VLC (I don't know what's installed by default with Ubuntu) and playing the DVD. If you don't have either, I'd try MPlayer first. Both can be installed with Synaptic, apt-get or another package manager (if Ubuntu switched to something other than Synaptic - apt-get should always work though). It might just be a problem with the automounting program.

00:00.0 Host bridge: nVidia Corporation C55 Host Bridge (rev a2)
00:00.1 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:00.2 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:00.3 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:00.4 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:00.5 RAM memory: nVidia Corporation C55 Memory Controller (rev a2)
00:00.6 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:00.7 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:01.0 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:01.1 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:01.2 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:01.3 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:01.4 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:01.5 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:01.6 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:02.0 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:02.1 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:02.2 RAM memory: nVidia Corporation C55 Memory Controller (rev a1)
00:03.0 PCI bridge: nVidia Corporation C55 PCI Express bridge (rev a1)
00:09.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a1)
00:0a.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a2)
00:0a.1 SMBus: nVidia Corporation MCP55 SMBus (rev a2)
00:0a.2 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2)
00:0b.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1)
00:0b.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2)
00:0d.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1)
00:0e.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a2)
00:0e.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a2)
00:0e.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a2)
00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2)
00:0f.1 Audio device: nVidia Corporation MCP55 High Definition Audio (rev a2)
00:11.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a2)
00:12.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a2)
01:00.0 VGA compatible controller: nVidia Corporation GeForce 8500 GT (rev a1)
02:07.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22/A IEEE-1394a-2000 Controller (PHY/Link)
02:09.0 Network controller: Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller (rev 02)