As title states, where can i find instructions or how can i transfer license from one computer to another?

Thanks,

For Mach4 you will need to install Mach4 in demo mode and get the
PCID of the new computer. Then log into your account at Machsupport.com
and go to the License Maintenance page to issue yourself a new license.

There is a video of the process here:

https://www.youtube.com/watch?v=_sSofveXnkQ

If you do not have an account at Machsupport.com because your license
was provided directly by a reseller, you will need to contact that reseller
for assistance. This mode was common back in 2014 and 2015 but was
later replaced by self managed licenses for most users.

Money, Money, Money 

Not sure what you mean by "Money, Money, Money". There is no
fee for moving licenses or issuing additional licenses up to 5 total
using the License Maintenance function on the web site.