For getting past a door with a maglock it's usually going to be either a Hardware + Logic roll, or the use of a Maglock Passkey (if it's a keycard system) which is quite a bit more expensive (Rating x 2,000 nuyen), but doesn't require any skills of your own. If it's a keypad system you can use the Keycard Sequencer (which is
also expensive only Rating x 200 nuyen), but that still requires you to make a Logic + Hardware roll to crack open the case and hook up the sequencer. If it uses biometrics (fingerprints, retina scans, DNA), then you'll need to steal that and imitate it somehow, which also takes expensive gear.... unless you, again, crack open the case and rewire it with the Hardware skill.
If you want to actually outright hack the thing's software, then you're going to need to invest a fair bit in either hacking skills or an Agent program to do the hacking for you. Hopefully your team's hacker will have that covered.
The cheapest way, in terms of nuyen, to open a door is either using the Hardware skill with a specialization in Maglocks (all you need is a toolkit at most)... or using the Demolitions skill to plant an HE grenade with a remote detonator for maximum effect.
No, actually, scratch that. The
absolute cheapest way is to steal the keycard from somebody who works there. Stolen stuff is free.
If it's the rare door with an old-school pin-and-tumbler manual-key lock, then a high-rating Autopicker will take care of it quite handily for a mere Rating x 200, even if you don't have the Locksmith skill.
EDIT: Fixed a few things I'd misremembered.
