pairs and how to play them from early position in NL tourney

[MrMe]

To my understanding the gap concept tells you to raise with hand you would rather call relating to ring games. So the QJ o had to be at least suited to to do so. But what about pairs if you are under the gun.

Another thing is a pair on the small blind nobody raises and I call that 25 blind to 50 dollar get 10- K-8 somebody raises and turn is a 4 well I folded already. Should I prevent that to say well everybody calls i will raise my 4-4 like 4/5 times the blind.

The guy won with a pair of tens. I find it tough.

A lot of questions, I aprreciate your knowledge

Thanks