Can anyone tell me at what churches the following events happened at and any additional indexed information e.g. parishes of couple etc:
Marriage of Alexander McGregor and Eliza Streater, 1847, Contin
Christening of Alexander MacGregor, 1815, Dingwall
Marriage of Simon McGrigor and Margaret MacKenzie, 1811, Fodderty
Christening of Margaret MacKenzie, 1796, Dingwall
Marriage of John MacKenzie and Christy MacDonald, 1792, Dingwall
The only way you will get any additional information is by viewing the original images on Scotland's People, as you already know.
The originals will not tell you the names of the parents of the couples, as information about fathers is only very rarely included in pre-1855 marriage records, and mothers almost never. They will tell you the names of the couple. They will normally tell you if either of the parties lived in a parish other than the one where the marriage was recorded. They may or may not tell you the date of the actual wedding, where the couple resided and/or their occupations, and who performed the wedding ceremony. They are very unlikely to tell you exactly where the wedding ceremony took place.
Until the beginning of the 20th century, it was very unusual for a wedding ceremony to take place in the kirk building. The traditional place was in the bride's home or, if her parents were dead or she married a long way from home, in the manse or in her employer's house.
In most rural parishes there was only one kirk and one minister, though some parishes had a few people who belonged to a minor or dissenting sect or denomination. The Statistical Accounts of each parish usually mention the existence of any such - see
http://stataccscot.edina.ac.uk/static/statacc/dist/homeThe parish registers that make up the Scotland's People main database are the registers of the Church of Scotland. The C of S was supposed to keep a record of all baptisms performed in the parish, and all banns called there, but didn't always do so, especially in the Highlands where parishes were very large with scattered populations, sometimes living many miles from the kirk by difficult tracks and paths.
So the overwhelming likelihood is that all those couples were married by the C of S minister of the parish where the marriage was recorded, but not in the actual kirk building itself.