I suggest you to build complete new system, save up bucks and buy when you got it.
Because 1050Ti wont get full potential with Quad core neither with Dual Core, yes you may use it but its pointless, as Q6600 can barley run GTA 5 and other games, ESEA games like dota 2 and CSGO (competitive ones) can run fine, but CSGO is more depended on CPU.
Well whats your budget then?
Haswell and ivy bridge can run very well, and they are cheap to come.