I recommend a quality printer like the Prusa i3 MK3:
You can build things like this with it:
Electronics had may as well be lego bricks, these days. If you want to make a robot, you can mostly plug together cheap pre-built modules on breadboards. Outfits like Pololu have great options for things like small-scale motor control and DC/DC conversion, and tiny displays/sensors/etc are ubiquitous.
I’ve been pushing hard on new developments and need to spend more time documenting my projects. But I have some info on another robot here:
There’s lots of cool robots on hackaday:
I also recommend browsing http://reddit.com/r/3dprinting as there is a lot posted there. And check out http://reddit.com/r/RobotBuilding
I also run a website to discuss projects that have a social impact. That’s at http://reboot.love
There’s a lot of good stuff online!