IT Support career path

La Chupacabra

Hello,
For the last 5 years I've been working as a self-employed IT Technician in London.
I've been dealing with all sort of software and hardware problems of Windows and Mac OS computers.
Currently I'm looking for a employment as a IT Support Technician. In most job offers for help desk\desktop\IT support it's required to know Windows Servers, so probably I will have to learn it to find a job. I have couple of questions regarding that;
1) How long it takes to learn Windows Servers for someone who knows Windows XP, Vista, 7 and 8 very well
2) What is the best way to learn it? I read many opinions that the best way to do it is to build own Server and use some free online tutorials. Any suggestions?
3) Is it worth doing Server+ certificate or something similar?
4) What other programs I should learn to find a job like this?
5) I have few more months of access to CISCO online study as in the future I would like to work in networking. Is it OK to study servers and networking at the same time or is it going to be confusing?
6) Is it worth doing CISCO certifications or are there better certificates than CISCO's, like Networking+?
My main goal is to find an employment as soon as it's possible.
Thank you in advance for your help