A few relevant Mantras/Hymns/Riks in regard to marriage in the Vedas are mentioned below
Rig-Veda says, "Wife is verily a home" (1-66-5, 1-77-3 and 3-54-4). After marriage the girl can attend and address Vidhata (Assembly regarding religious and spiritual matters) and Sabha (Assembly regarding social, economics and political matters) and should conduct as per Rta (cosmic Laws of necessity) and Dharma (Rig Veda 10-85-26 to 42 and 47. Atharav Veda. 14-1-20, 22. 14-2-64, 71). She is the mistress and ruler of the house. Virtuous, noble, educated wife of an unimpeachable character and conducts devoted to her husband with body mind and soul enjoy the highest bliss. Atharva Veda 14-1-20 enjoins the wife to go to husband's place and become the mistress of the house.
However, for those who do not have faith in the permanent truths and commandments of the Vedas and prefer to follow non divine vocations by resorting to bribery, magic, miracles, adulteration of food, the Vedic metaphysics is silent about the marriage institution for them. Out of six kinds of marriages mentioned in Rig Veda like Brhama Vivah, Gandharva Vivah, Asura Marriages based on use of force and any kind of pressure are not advised in Rig Veda. Bigamy, polygamy and polyandry is not advised to Arayans (noble persons).
Rig-Veda 6-64-6 says, at the time of marriage the woman should preferably choose a man who likes her most and is delighted to see her. Parents should give freedom to the young girl to choose her life partner through the institution of Svayamvara, which literally means self choosing of a husband (R.V 5-47-6 and 1-71-8). The path-finders found highly ethical and divine principles in regard to the institution of marriage. God is present when sex is resorted to for the purposes of procreation only in socially recognised marriages.
A number of socially recognised marriages have been mentioned. Love marriage is considered superior to arranged marriage. Parents should encourage those young men and women who love each other and want to get married. This kind of Marriage is Brahma Vivah (marriage blessed by God). There is no mention anywhere that marriages should be within the same Varna. More emphasis is on the same level of intelligence, ability and the proficiency in Vedic education. Both degree holders should preferably marry each other but their children could be assigned different Varna based on merit, aptitude and capacity. There is no mention of 4 Varnas (Brahamin, Kshatriya, Vaisha and Shudra) by birth in the Vedas.
Marriages arranged by parents are also contemplated. However, the institution of svayamvara where the bridegroom has to fulfill certain conditions of expertise, strength, power, knowledge etc., is to be fulfilled as prescribed by the parents of the bride, before finally getting married. This clearly shows the great importance Vedic rsis and munnies gave to women. No dowry system is mentioned anywhere. Vedas leave no doubt those male female relationships are more on the principle of co-equal relationship of the cosmos i.e. between Purusha (the Supreme Reality) and Prakrti (Supreme Mother) and thus provide divinity and sanctity to the institution of marriage.
For more details on Marriage, Four divine Varnas and Fifth non divine Avarna , Ideal Vedic Society etc, kindly refer to Glimpses of Vedic Metaphysics available on Internet for online reading/taking print at no cost. Website is <http://www.sabhlokcity.com/ metaphysics>. The book is also accessible through Google.com.Yahoo.com and lulu.com. Please search for Vedic Metaphysics.