Wrong forum for this to be honest mate, but ill give ya some help never the less =]
personally, i would go for loaning a couple of good players form a team a couple of leagues above you. Also, try and get a few free transfers, offer them a trail for a week or two, see you and your coaches think of the player, then if hes good, sign him.
As for tactics, it just depends what your prefered tactic you like, personally the classsic 4-4-2 with the left and right midfielders running to the by-line and crossing in the box and looking for the header from a striker. For me i would look for a striker with a good heading ability, because i seem to think that works best...
So i hope thats any help for you