You dont specify positions so Ill offer ideas in every one:
GK: Pierrick Cros (but train distribution for about a season)/Enyeama
LB: Carles Planas/Kiko Femenia/Sime Vrsaljko (may be too expensive for you) -play on either side/ Laurens De Bock.
RB: Chris Solly/C. Dibon
CB: Strandberg (an absolute MUST)/Sviatchenko/Almeback/Alex Milosevich/Enzo Andia/Bellusci
DM: Mate Simao (wp issues maybe)/Guido Pizarro/Rainford Kalaba/Andile Jali
AMR/L/WINGERS: Thomas Drage/Fabbrini/Nathan Dyer (may be too expensive in first season)/Muralha 1.8 release clause.
CF: Iago Aspas (8.2m release clause so can be bought using instalments for whole price/Maupay (1.29m compensation - an absolute MUST. 15yo and can be a goal machine from the get go)/Sassa (Botafogo. 18 yo 4.4m release, Awesome)/Kweuke (4.2 mil if you wait as he becomes transfer listed within a couple of weeks. Look in my below thread for advise on how to get him - A beast of a player)/N'Djeng/C. Danalache.
Or look here:
http://www.fm-base.co.uk/forum/football-manager-2013-discussion/109333-manumads-box-sweets.html