1991 Toyota pickup

1991 Toyota pickup 245187 miles original and estimated about 1500 miles scence motor rebuilt. When rebuilt I but a new throttle body sensor on but never had it set by computer needs to be done. Has exhausted leak by header they sent me the wrong gasket for manifold has a surging idel issue I’ve tried all the little tricks to fix it but I think it may need new throttle body. And 4x4 shifter is stuck was working last time I used it don’t know the issue. All in all it’s a great little truck runs good just need to work out those little kinks..