2 stupid question: raising from the blinds/folding nuts

[emil3000]

Newb questions. Forgive me. Assume 100BB stacks.

1. Got some solid recommendations for raising from the blinds? I went ahead and did it with 6789ds just now, is that a good idea? I figured at least it's not aces, but I do hate bloating a pot out of position.

2. Limped with KK52ss. Flopped a34 twotone, with a backdoor flushdraw. checked. came back with a bet and a call from unknowns... this should be a fold right?