Start the game in COMPETITIVE mode, choose terrorist, then paste this into your console:

game_mode 0;
game_type 3;
exec gamemode_competitive;
mp_t_default_secondary weapon_hkp2000;
mp_startmoney 0;
mp_halftime_duration 0;
mp_maxrounds 99;
mp_freezetime 5;
mp_roundtime_defuse 60;
mp_roundtime 60;
mp_restartgame 1;

I was having the same problems as everyone else with buying weapons and whatnot and I couldnt find where anyone had a solution so I figured it out. Comment so people notice! ☻