[oxymoron]

1) A few weak players call in early and mid position. I am in cutoff with KTs. Do I raise? (ive been just calling)

I raise to buy the button and vary my play on the flop. I used to make the mistake of autobetting most flops and I'm working on correcting that now.

Same question and now I have KQo (i usually call)

Raise always when everyone limps.

2) I have KJo on the button and there is one limper (I usually call)

I raise to limit the field isolate the limper and you have position. The blinds will fold or if they are decent will 3bet.

3) I have A2s and there are 4 limpers (I usually call)
I limp. Occasionally if I am in the blinds I will raise knowing everyone is calling to give me better odds at draws.

4) I have 44 on the button and it is folded to me (I usually fold)

I typically raise but would depend on the blinds.

5) I have QTs UTG (I usually call)
Fold - unless you are getting to much respect or the table is loose.