1995 Honda Passport (same as Isuzu Rodeo) clutch and starter

Ok, here I have problem. First of al, about month ago I bought this car, the person who sold me, told it needed new clatch, so I rode for few weeks, then it went realy bad, so I bought new and replaced it. Seems all good, but now I have same problem, when car is cold, it doesnt slip at all, runs strong, but after about 20 minutes on the road, you can feel it slips when you press extra gas. Now its real bad after car warms up, and I have no idea were the problem is?

second, other day I came home, but next morning couldnt start car, no click sound, battery is good, I push started, all starts and runs, but cant start. So I went and bought new starter, took out old one and replaced. And in hopes, it didnt start again, no click noiese or anything.I checked all the fuses, all good, relay is good. Were could be the problem?
help please? :D