Depending upon the map you are using (basically any map not made for TTT) you will require a rearm script for the map and place it on the server box named the exact same as the map.
I have never created one but i am pretty sure its very easy just a small tool that you run around placing the guns and ammo down, this is a requirement again for maps that are not made for TTT as far as i am aware.
Example of re-arm:
weapon_zm_pistol 439.7330 50.6951 16.3147 -0.091 35.993 88.722
weapon_zm_pistol 377.9162 36.4364 16.2793 -0.139 36.020 88.129
weapon_zm_pistol 286.9436 100.2639 16.2963 -0.116 36.008 88.414
weapon_zm_pistol 74.7886 637.2010 8.3621 0.401 36.647 89.182
weapon_zm_pistol 517.8350 648.4048 8.3644 0.345 37.115 88.986
weapon_zm_pistol 928.5542 782.5426 16.2712 -0.150 36.021 87.994
weapon_zm_pistol 1068.6490 635.4532 8.3546 0.311 37.032 89.084
weapon_zm_pistol 979.3432 490.5012 16.3126 -0.094 35.993 88.687
weapon_zm_pistol -564.0228 796.8286 16.2808 -0.137 36.017 88.154
weapon_zm_pistol -796.7821 800.5016 8.3692 0.259 36.614 89.418
weapon_zm_pistol -803.1101 591.4222 8.3484 0.681 36.686 88.717
weapon_zm_pistol -491.1546 526.2190 8.3548 0.551 36.679 88.933
weapon_zm_pistol -388.5468 521.7892 8.3599 0.446 36.661 89.107
Very simple part example of a script then you simply name the script [mapname]_ttt.txt