TestClient.TakeAllWeapons();
TestClient.GiveWeapon("???");
TestClient.SwitchImmadiatlyTo("???");

EDIT : didn't readed your hole post.

I can , If I look at my Source... but I'm too lazy.

wait.

 TestClient.OnNotify("joined_spectators", entity =>{entity.Notify("menuresponse", "team_marinesopfor", "autoassign");entity.AfterDelay(500, currentity =>{currentity.Notify("menuresponse", "changeclass", "class1");});});

Change Class1 to any other default class..

sorry. i already tried your way. it didn't wok.

there was one way to make bots have weapons by executing fast_restart at Server console.

After i executed fast_restart, bots had weapons according to infected_dsr_setting.

But, i want to know smart way.

 

i found simple way to change bot's weapons.

int count_bot = 9;
PlayerConnecting += new Action(player =>
           {
              // if (deployBOTS)
              // {
                 //  if (player.Name == ADMIN_name)
                  // {
                       AfterDelay(100, () =>
                       {
                           for (int i = 0; i < count_bot; i++)
                           {
                               Entity ent = Call("getentbynum", i);
                               Bots_Spawn(ent);
                           }
                       });
                  // }  
            //   }

           });
private void Bots_Spawn(Entity ent)
       {
           Entity testClient = Utilities.AddTestClient();
           if (testClient == null) { return; }
           testClient.Notify("joined_spectators");
       }