Will a GT 710 and a wifi adapter fit my pc?

[GoodaBrine XD]

Pc - http://www.ebay.com.au/itm/Dell-Optiplex-780SFF-Desktop-PC-Core-2-Duo-3-0Ghz-4Gb-Ram-Win-7-Pro-Warranty-/201448640084?hash=item2ee7464e54:g:8g0AAOSwd0BV1nzV

Adaptor - https://www.pccasegear.com/products/17622/tp-link-tl-wn851nd-300mbps-wireless-n-pci-adapter

Card - https://www.pccasegear.com/products/34812/msi-geforce-gt-710-2gb

 

[CountMike]

Looks like they would, there's one PCIe X16 slot for GPU and a PCI slot to put that WiFi card in. On both cards you would have to use shorter back plate and that would exclude VGA connector on that GPU.
Does your monitor have any other connectors, like DVI maybe ?
If it doesn't you will have to use DVI to VGA adapter which may be supplied with card.