I think your best bet (to start with) will be see if you can get VNC or similar to work with it, you can still use local keyboard and mouse connected to the RPi and just use it as a screen.
Only time will tell if it'll be like typing in a tub of treacle or not though.
As for directly connection, it depends on a lot of factors, since each display has it's own specific connections and protocols it is unlikely to be a simple task. There are lots of posts discussing this and hopefully suitable screens will be identified that are easy to interface and cheap.
A Magazine for Raspberry Pi Users
Read Online or Download for Free.
My new book: goo.gl/dmVtsc
Meltwater's Pi Hardware - pihardware.com
Like the MagPi? @TheMagP1 @TheMagPiTeam