Hi Berk,

Welcome to the forum!

Yes and yes. It would be better to stick with K track, though, or just bite the bullet and switch to C track before the sunk costs make the switch unattractive. They can be bought second hand too.

Well, you can certainly put a second analog locomotive on the tracks - but you cannot control them separately.

If you want to run several locomotives independently, using signals is the preferred way to do it. For two locomotives, you would need at least three signals, so that you can divide the track in three segments, one for each loco and one free segment so that one or the other loco can move into it.

Alternatively, you could just use 7274 boxes to switch power on and off on selected track segments; with this, you can park one loco on a siding while running the other.

By the way, newer starter packs since about 1992 come with a BR 89 006 having DELTA decoder. Are you sure yours is analog?

Nope, 7072 is a different box, used to control switches and signals. Older models 7210 and 7211 are equivalent with 7274, as is the box 7273. 7211 and 7273 are bit more versatile at the cost of more wiring.

Of course, you also need a way to isolate track segments and connect the segments to the 7210/7211/7274 boxes. For K-track, the pieces 7500, 7504, and 7522 are intended for these purposes. I have no experience on K tracks myself, but probably there are DIY approaches to achieve the same result.

Your locomotive is indeed a classical analog BR 89. Enjoy!