Tateyama Kurobe Alpine Route

I'm trying to find the bus-timetable from Ogizawa to Nagano Station. Most seems to relate from Ogizawa to Shinano-Omachi Station.

I presume at Dentetsu-Toyama Station that I should be getting the tickets all the way to Ogizawa Station?

Thanks.

I'm trying to find the bus-timetable from Ogizawa to Nagano Station.

Here you go:
http://www.alpico.co.jp/access/express/nagano_omachi/

I presume at Dentetsu-Toyama Station that I should be getting the tickets all the way to Ogizawa Station?

Yes.

Be advised that the route opens fully only at April 17.
I haven't managed to understand if and what parts are open before.

http://www.alpen-route.com

Only the section between Midagahara and Murodo does not open until April 17. The rest of the route opens from April 10:
http://www.japan-guide.com/e/e7550.html

Thanks. I'm travelling that route on April 25th.