The resolution of the framebuffer console is controled by the vga=something parameter in /boot/grub/menu.lst
Change the existing value to the one that matches your requirement:
Code:
| 640x480 800x600 1024x768 1280x1024
----+-------------------------------------
256 | 0x301 0x303 0x305 0x307
32k | 0x310 0x313 0x316 0x319
64k | 0x311 0x314 0x317 0x31A
16M | 0x312 0x315 0x318 0x31B
Can't help with the fonts. Maybe this is also related to a wrong resolution.