Setting console size is, AFAIK, done via lilo or GRUB. You set the console width in columns (characters) and height in rows (carrage returns).
Are you running Damn Small Linux? or are you on a Data Subscriber Line (internet connection)?
if it is the latter, a lot of X-based programs have a console mode operation and possibly are based on a console-only application.
I believe such things may also be dealt with via a shell script. However, I cannot help you with that as I have no experience in it, yet.
If it is the former, I have no idea what you mean.
If you want to boot faster, try using initNG. You'll probably need to get some updated libs too.
You could disable any graphical bootup screens, and use XDM instead of GDM or KDM.