We have 4 Mikrotik

Number 1 is the main ROUTER

Other #2 #3 #4 connect to #1 different ways, so first i need yours help to connect this devices between device #1

1- I want that Device #2 connect to Deivce #1 with simle LAN cable.
Pls say me how to setup Mikrotik with this?

2 - I want that device #3 and #4 connect to Device #1 with VPN or other tunels.
Pls say me how to do this???

3 - Next will be to do routes: Routes must be like
If device #3 or #4 want to go to device #2 they must go through device #1 (port eth3)
or if device #2 want to go to device #3 or #4 - it must go through port eth3 on device #1 and device #1 rout it to device #3 or #4

Sorry for my English.. i;m from Russia!

Thanks for help to everyone!