You wont be hooking up shifter and pedals with no g25 wheel unless you are something like an electronics engineer. Oh, and you need to know how to program yourself a driver for it.

The easiest way would be use a PS2 type pad and hook up the pedals to the analog joysticks and the shifter,... well there's a PCB that decodes the shifter positions, have fun with that.

Sorry mate but the G25 is hell cheap. A few years ago your only option for shifter/clutch was around $2,500 AUD. If you can't fork out ~$300 for a G25 then you will have to build your own shifter. Or buy a SST shifter ($199 USD?) which will operate on its own and make a clutch pedal with a modded PS2 pad analog input. But after you done that you not much difference from a $300 g25

TBH, just keep saving. Ask people for cash (NOT GIFT VOUCHERS!) for chrissy instead of socks+jocks. if your budget is $200, another 85 shouldn't be too hard. I paid $280 for mine from a wholesaler about a year and a half ago.