2000 Oldsmobile Intrigue Starter

I just bought this car, 3 days ago actually. It first started the other day when I started the car, but the radio wouldn't turn on, It finally did. Then I was driving it, everything was fine, and the blinkers wouldn' work, they finally did. Now The car won't start. I turn the keys, and the radio turns on, but you can't even hear the starter at all. I waited about an hour, and tried it again, it worked perfect. 5 hours later, it did the same thing, won't start. I'm afraid to leave my house and get stuck somewhere. before I take it back the the independent dealer and scream, I would just like your input. thanks so much!