Hi I need virtual instruments from full orchestra like various strings,sax,mandolin harps,clarionate,kora,etc. I do not have a cakewalk recording software. How can i get these instruments and can i play them in 1) Mixcraft and 2) Presonus studio one DAW

Pretty simple answer to this one: Buy them. The Cakewalk store has Dimension pro with various Expansion packs with those instruments. There are also many other companies that sell VST plugins. Not sure if Mixcraft takes VST (since you own it, you should be telling me), but Studio One definitely does.

Hi Thank you for a quick teply I want to buy it but can I get some details as to which are the instruments in this? Mixcraft reall accepts all types of vesti

sorry ...had to delete links since this is cakewalk instrument section. click on the store section at tthe top and check out some of the damples for dimension pro. If you need something more extensive, check out Vienna symphonic library or Eastwest symphonic orchestra

The best option is to buy 'Dimension Pro' from the Cakewalk store.
Dimension already has many classical instruments, including the Garritan Pocket Orchestra.
If you like the program, you can also buy an instrument pack: 'Dimension Vol. 5 Studio Orchestra' expansion (from Digital Sound Factory). Also available from the Cakewalk store.