Hi,
I had this problem of small font size in vcmp and i know there is a setting which can be changed, but i never searched for it. Today i came upon it bychance, and i am posting it for anybody who has this problem in future..
While in game, just type
/setconfig con_fontscale 1.7
That's it you get bigger font.
Here is a full list: List of values for vcmp_config.txt (https://forum.vc-mp.org/?topic=12.0)
It is stickied in Support board (https://forum.vc-mp.org/?board=6.0).