mazda engine problems..

Ya so my 88 B2200 is a decent truck, didnt pay much for it but man it gives me one problem after another. The ignition switch has like 4 dead spots in it that makes it shut off while Im driving or not start at all. But thats the least of my worrys. The carb is pretty much shot, on a bad day itll bog and hesitate and buck when trying to accelerate but the biggest pita is it wont idle at a stop light, I have to use 3 feet to work all the pedals to keep it running when I come to a stop. Raising the idle doesnt help besides make it race at like 1500-2k rpm, neither do the mixture screws but theres gas in some vacuum lines, I have plenty of mechnical experience to see its bad.

What are my options to getting this fixed? I do not want to spend much money and a rebuilt import carb is a good amount of money, and Im assuming anything aftermarket is more. The engine also burns/leaks oil like crazy, and I saw someone said Autozone or someone has a rebuild kit for like $350..its more money than Id like to spend but rebuilding stuff is pretty fun heh.

I also want to get rid of all the air injection and evap crap and the 10000 vacuum lines everywhere. Lemme know whats up, thanks.