Are you in the first season?? check out the freeby players and loan some youth from seria a teams.
tactics wise, do you want to use a wide formation with wingers or do you want to play thru the middle without wingers?
i've found the best one for me is a 532 variant, started of as Boskivic's and then i changed it a bit. after losing loads of games last season, i tried this, and in about seven games i won five and drew 2. so far in preseason i've won 4 games very convincingly, yet to try it again in the league though.
try this website:
www.fmdownloads.net
and look for The Boskovic Regime mk3 Vauxhall Aug
just because it works for me, won't neccessarily work for you, look at what players you have and their postions, play to their strengths!!