Regarding the closing down aswell.
Set your defenders to tight marking, marking style: man. Also allow close down often (Not all the way though) and hard tackling. This should sort out the problems with the closing down and shore up your defence.
If your a small club with limited funds, then I suggest taking a look at Diego Bounanotte who improves nicely and scores goals, Pablo Piatti who's just class and Mika Aaritalo who's a goal machine.
Enjoy!