In British English the word is normally pronounced /ˈvɪkə/. Why do you wonder at this? Many vowels become schwa-like in unstressed syllables. [h=2][/h]
I don't know what you mean by "r-controlled". In many varieties of BrE, the r is not sounded unless immediately followed by a vowel, as in 'the vicar is dead'.
But if you want to know how "vicar" sounds, your best bet would be to listen to how it's pronounced by native speakers. That page about the "r-controlled vowels" doesn't really contain any terribly useful information.